Final answer:
The predicted top 5 countries in 2050 are India, China, the United States, Nigeria, and Indonesia.
Step-by-step explanation:
The predicted top 5 countries in 2050 are India, China, the United States, Nigeria, and Indonesia.
According to the U.S. Census Bureau, India is projected to become the most populous nation by 2050, surpassing China which is currently the most populous country. The population of India is expected to reach 1.7 billion by 2050.
The United States will remain the third most populous nation with a population of 423 million in 2050, up from 308 million in 2010.
Nigeria will have a population of 402 million in 2050, up from 166 million in 2010, making it the fourth most populous country.
Indonesia is projected to become the fifth most populous country by 2050 with a population of 322 million.