Finding the Fourth Proportional to 86.08, 129.12 and 37.92
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Solution
The fourth proportional to 86.08, 129.12 and 37.92 is: 56.88
Step by Step Solution
- Step 1: Write the proportion equation
86.08 : 129.12 = 37.92 : x - Step 2: Convert to fraction form
86.08/129.12 = 37.92/x - Step 3: Cross multiply
86.08x = 129.12 × 37.92 - Step 4: Simplify right side
86.08x = 4,896.23 - Step 5: Solve for x
x = 4,896.23/86.08 - Step 6: Final answer
x = 56.88
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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.