Finding the Fourth Proportional to 87.08, 129.99 and 76.95
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Solution
The fourth proportional to 87.08, 129.99 and 76.95 is: 114.86
Step by Step Solution
- Step 1: Write the proportion equation
87.08 : 129.99 = 76.95 : x - Step 2: Convert to fraction form
87.08/129.99 = 76.95/x - Step 3: Cross multiply
87.08x = 129.99 × 76.95 - Step 4: Simplify right side
87.08x = 10,002.59 - Step 5: Solve for x
x = 10,002.59/87.08 - Step 6: Final answer
x = 114.86
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.