The following bar graph shows the sales of books (in thousands) from six branches of a publishing company during two consecutive years 2018 and 2019 .

What is the ratio of the total sales of the second branch for both years to the total sales of the fourth branch for both years?

7 : 9

Ratio of the total sales of the second branch for both years to the total sales of the fourth branch for both years,

= ( 75 + 65 ) : ( 85 + 95 )

= 140 : 180

= 7 : 9