**Explanation:**

To calculate the number of males per 100 females in the world population, we need to consider the sex ratio. The sex ratio is defined as the number of males per 100 females.

According to the United Nations, the estimated sex ratio for the world population is approximately 102 males per 100 females. This means that for every 100 females, there are 102 males.

**Factors influencing the sex ratio:**

Several factors can influence the sex ratio of a population, including biological and social factors. Some of these factors include:

1. Biological factors: The sex ratio may be influenced by biological factors such as the probability of conceiving a male or female child. In general, there is a slightly higher probability of conceiving a male child, which can contribute to a slightly higher sex ratio.

2. Migration: Migration patterns can also influence the sex ratio of a population. For example, if there is a higher number of male migrants compared to female migrants, it can result in a higher sex ratio in the destination country.

3. Cultural and social factors: Cultural and social factors can also play a role in shaping the sex ratio. In some societies, there may be a preference for having male children, leading to imbalanced sex ratios.

4. War and conflict: In regions affected by war and conflict, the sex ratio can be significantly altered. For example, if a large number of young males are killed in a conflict, it can result in a lower sex ratio in the affected population.

**Conclusion:**

In conclusion, the estimated number of males per 100 females in the world population is approximately 102. This sex ratio is influenced by various factors such as biological, social, and cultural factors. It is important to note that the sex ratio can vary among different countries and regions.