Finding the Fourth Proportional to 86.59, 129.98 and 59.28
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Solution
The fourth proportional to 86.59, 129.98 and 59.28 is: 88.99
Step by Step Solution
- Step 1: Write the proportion equation
86.59 : 129.98 = 59.28 : x - Step 2: Convert to fraction form
86.59/129.98 = 59.28/x - Step 3: Cross multiply
86.59x = 129.98 × 59.28 - Step 4: Simplify right side
86.59x = 7,705.21 - Step 5: Solve for x
x = 7,705.21/86.59 - Step 6: Final answer
x = 88.99
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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.