Finding the Fourth Proportional to 121,715.10, 182,572.65 and 74,994.30
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Solution
The fourth proportional to 121,715.10, 182,572.65 and 74,994.30 is: 112,491.45
Step by Step Solution
- Step 1: Write the proportion equation
121,715.10 : 182,572.65 = 74,994.30 : x - Step 2: Convert to fraction form
121,715.10/182,572.65 = 74,994.30/x - Step 3: Cross multiply
121,715.10x = 182,572.65 × 74,994.30 - Step 4: Simplify right side
121,715.10x = 13,691,908,085.90 - Step 5: Solve for x
x = 13,691,908,085.90/121,715.10 - Step 6: Final answer
x = 112,491.45
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Double scale
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Similar ratio
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1.5x scale
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.