Tulsa, Oklahoma is 3.6 times larger than Olathe, Kansas.
Area: 157 km2 calculated
Olathe is a city in and is the county seat of Johnson County, Kansas, United States. Located in northeastern Kansas, it is also the fourth most populous city in the state, with a population of 125,872 at the 2010 census. Olathe is the fourth-largest city in the Kansas City metropolitan area. Wikipedia
Area: 569 km2 calculated
Tulsa is the second-largest city in the U.S. state of Oklahoma and 46th-largest city in the United States. The population has grown since the 2010 census, With a population of 398,121 as of July 2013. Wikipedia