If the ratio of bicycles, buses, and cars is 4:1:4, and the total number of vehicles is 72, we can calculate the number of buses using the given ratio.
Let's denote the number of buses as x.
According to the ratio, the number of bicycles is 4x and the number of cars is 4x.
The total number of vehicles is the sum of the number of bicycles, buses, and cars:
4x + x + 4x = 72
Combining like terms:
9x = 72
Dividing both sides by 9:
x = 8
Therefore, there are 8 buses.