Riverside, California is 2.4 times larger than Fort Lauderdale, Florida.
Area: 88 km2 calculated
Fort Lauderdale is a city in the U.S. state of Florida, on the Atlantic coast 23 miles north of Miami. It is the county seat of Broward County. As of the 2010 census, the city had a population of 165,521. Wikipedia
Area: 208 km2 calculated
Riverside is a city in Riverside County, California, United States, located in the Inland Empire metropolitan area. Riverside is the county seat of the eponymous county and named for its location beside the Santa Ana River. Wikipedia