Finding the Fourth Proportional to 91.68, 125.97 and 87.66
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Solution
The fourth proportional to 91.68, 125.97 and 87.66 is: 120.45
Step by Step Solution
- Step 1: Write the proportion equation
91.68 : 125.97 = 87.66 : x - Step 2: Convert to fraction form
91.68/125.97 = 87.66/x - Step 3: Cross multiply
91.68x = 125.97 × 87.66 - Step 4: Simplify right side
91.68x = 11,042.53 - Step 5: Solve for x
x = 11,042.53/91.68 - Step 6: Final answer
x = 120.45
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.