GDP on a ppp basis is ranked 13 in the world. Higher than Australia Kap.I posted the link in the post
Not sure where you get 115 from.
How does a country who has a gdp ranked 115 belong in the G20
Visualizing the Composition of the World Economy by GDP (PPP)
After adjusting GDP for purchasing power parity (PPP), here is how the composition of the world economy breaks down by country.
www.visualcapitalist.com