Ratio is similar to Proportion. Proportion is related to Measurement. Measurement is related to Price. Price is related to Admission. 
you are likely to find People in/at/on Corner. People is a synonym of Folk. 
Ratio <--SimilarTo--> Proportion <--RelatedTo--> Measurement <--RelatedTo--> Price <--RelatedTo--> Admission 
Corner <--AtLocation-- People <--Synonym--> Folk 