CREATE TABLE table_41855 ("Rank" FLOAT, "Location" TEXT, "Total Passengers" FLOAT, "Annual change" TEXT, "Capacity in use" TEXT)

In Which rank was there a location of porto alegre?
SELECT "Rank" FROM table_41855 WHERE "Location" = 'porto alegre'
SELECT "Rank" FROM "table_41855" WHERE "Location" = 'porto alegre'