Finding the Fourth Proportional to 91.11, 125.70 and 84.74
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Solution
The fourth proportional to 91.11, 125.70 and 84.74 is: 116.90
Step by Step Solution
- Step 1: Write the proportion equation
91.11 : 125.70 = 84.74 : x - Step 2: Convert to fraction form
91.11/125.70 = 84.74/x - Step 3: Cross multiply
91.11x = 125.70 × 84.74 - Step 4: Simplify right side
91.11x = 10,651.19 - Step 5: Solve for x
x = 10,651.19/91.11 - Step 6: Final answer
x = 116.90
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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.