Finding the Fourth Proportional to 172.08, 257.94 and 74.55
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Solution
The fourth proportional to 172.08, 257.94 and 74.55 is: 111.75
Step by Step Solution
- Step 1: Write the proportion equation
172.08 : 257.94 = 74.55 : x - Step 2: Convert to fraction form
172.08/257.94 = 74.55/x - Step 3: Cross multiply
172.08x = 257.94 × 74.55 - Step 4: Simplify right side
172.08x = 19,229.43 - Step 5: Solve for x
x = 19,229.43/172.08 - Step 6: Final answer
x = 111.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.