Finding the Fourth Proportional to 91.13, 125.79 and 58.43
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Solution
The fourth proportional to 91.13, 125.79 and 58.43 is: 80.65
Step by Step Solution
- Step 1: Write the proportion equation
91.13 : 125.79 = 58.43 : x - Step 2: Convert to fraction form
91.13/125.79 = 58.43/x - Step 3: Cross multiply
91.13x = 125.79 × 58.43 - Step 4: Simplify right side
91.13x = 7,349.28 - Step 5: Solve for x
x = 7,349.28/91.13 - Step 6: Final answer
x = 80.65
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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.