The population of a small city decreased every year due to water contamination. The present population of the town is 1,39,650. Last year, the migration rate was 2%, and the year before last, it was 5%. What was the population of the city two years ago?

In a town with 30,000 professionals, teachers make up 11% of the total professionals. If 46% of teachers are male, what is the number of female teachers in the town?

In a town's professional breakdown, doctors represent 18% and clerks represent 8% of the total professionals. If the number of doctors is 3000 greater than the number of clerks, what is the total number of professionals in the town?