Finding the Fourth Proportional to 111.60, 167.08 and 72.99
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Solution
The fourth proportional to 111.60, 167.08 and 72.99 is: 109.28
Step by Step Solution
- Step 1: Write the proportion equation
111.60 : 167.08 = 72.99 : x - Step 2: Convert to fraction form
111.60/167.08 = 72.99/x - Step 3: Cross multiply
111.60x = 167.08 × 72.99 - Step 4: Simplify right side
111.60x = 12,195.17 - Step 5: Solve for x
x = 12,195.17/111.60 - Step 6: Final answer
x = 109.28
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.