Finding the Fourth Proportional to 88.68, 122.10 and 77.70
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Solution
The fourth proportional to 88.68, 122.10 and 77.70 is: 106.98
Step by Step Solution
- Step 1: Write the proportion equation
88.68 : 122.10 = 77.70 : x - Step 2: Convert to fraction form
88.68/122.10 = 77.70/x - Step 3: Cross multiply
88.68x = 122.10 × 77.70 - Step 4: Simplify right side
88.68x = 9,487.17 - Step 5: Solve for x
x = 9,487.17/88.68 - Step 6: Final answer
x = 106.98
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.