India the Third Largest Economy in the World

The growth rate of India's GDP has been exceeding Japan's for many years, mainly due to the higher population growth in India, becoming the world's most populous country 5 years ago, reaching a total of 1.5 billion people earlier this year. This could be compared to Japan where the population has decreased over the last 30 years by about 5 percent. This has given India a young workforce to drive the economy.
China is closing in on the US to become the largest economy in the world, due to a higher GDP growth rate and is projected to surpass in the near future, maybe already within 5-10 years.
Argument: According to the report Brazil, Russia, India and China - A Road in 2050 by Goldman Sachs, India will surpass Japan as the third largest economy in the world by 2032.
Questions: After India has followed China with a high GDP growth rate, what other countries can we expect start to grow rapidly? Will Pakistan, with an estimated population growth of almost 60% until year 2035, be able to gain on the growth rate from their neighbor India?