Bismarck is the capital city of North Dakota. Bismarck is located at 46°48′48″N 100°46′44″W.
Tripoli, capital city of Libya.
Vienna, the capital city of Austria, is located at 48 degrees north latitude and 16 degrees east longitude.
No part of the United States is located at 47 degrees east longitude.
The city located at 9 degrees north latitude and 39 degrees east longitude is Addis Ababa, the capital of Ethiopia.
Annapolis, capital city of the state of Maryland, USA.
Whitehorse
The city located at 6 degrees south latitude and 106 degrees west longitude is Lima, the capital of Peru.
Benin's capital city, Porto Novo.
Since you did not specify the directions of the latitude and longitude lines, the best assumption would be 15 degrees north latitude and 100 degrees east longitude. However, there is no capital city located there, and none at the other combinations. It is actually Chainat province in Thailand.
The closest capital is Rabat Morocco but its not that close
Jakarta, Indonesia.
Brasilia, Brazil.