Finding the Fourth Proportional to 121,129.20, 181,693.80 and 76,951.80
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Solution
The fourth proportional to 121,129.20, 181,693.80 and 76,951.80 is: 115,427.70
Step by Step Solution
- Step 1: Write the proportion equation
121,129.20 : 181,693.80 = 76,951.80 : x - Step 2: Convert to fraction form
121,129.20/181,693.80 = 76,951.80/x - Step 3: Cross multiply
121,129.20x = 181,693.80 × 76,951.80 - Step 4: Simplify right side
121,129.20x = 13,981,664,958.84 - Step 5: Solve for x
x = 13,981,664,958.84/121,129.20 - Step 6: Final answer
x = 115,427.70
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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.