Finding the Fourth Proportional to 86.76, 130.19 and 63.99
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Solution
The fourth proportional to 86.76, 130.19 and 63.99 is: 96.03
Step by Step Solution
- Step 1: Write the proportion equation
86.76 : 130.19 = 63.99 : x - Step 2: Convert to fraction form
86.76/130.19 = 63.99/x - Step 3: Cross multiply
86.76x = 130.19 × 63.99 - Step 4: Simplify right side
86.76x = 8,331.17 - Step 5: Solve for x
x = 8,331.17/86.76 - Step 6: Final answer
x = 96.03
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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.