The median country GDP is approximately $48.8 billion, which corresponds to Uganda at position 90 with $48.769 billion.
The largest economy (US) has a GDP of $27.7 trillion.
The smallest economy (Tuvalu) has a GDP of $62.3 million.
The 48 billion number represents the middle point where half of all countries have larger GDPs and half have smaller GDPs.
Well then you have to agree that $48.8 billion IS "something like $100 billion".