Panama is 5.5 times larger than Puerto Rico.
Area: 75,420 km2 World Factbook
Population: 3,608,431 (July 2014) World Factbook
Panama, officially the Republic of Panama, is the southernmost country of Central America and the whole of North America. Wikipedia
Area: 13,790 km2 World Factbook
Population: 3,620,897 (July 2014) World Factbook
Puerto Rico, officially the Commonwealth of Puerto Rico, is an unincorporated territory of the United States, located in the northeastern Caribbean east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands. Wikipedia