Finding the Fourth Proportional to 91,286.20, 136,929.30 and 84,287.80
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Solution
The fourth proportional to 91,286.20, 136,929.30 and 84,287.80 is: 126,431.70
Step by Step Solution
- Step 1: Write the proportion equation
91,286.20 : 136,929.30 = 84,287.80 : x - Step 2: Convert to fraction form
91,286.20/136,929.30 = 84,287.80/x - Step 3: Cross multiply
91,286.20x = 136,929.30 × 84,287.80 - Step 4: Simplify right side
91,286.20x = 11,541,469,452.54 - Step 5: Solve for x
x = 11,541,469,452.54/91,286.20 - Step 6: Final answer
x = 126,431.70
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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.