Finding the Fourth Proportional to 125,929.40, 188,456.70 and 115,431.80
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Solution
The fourth proportional to 125,929.40, 188,456.70 and 115,431.80 is: 172,746.76
Step by Step Solution
- Step 1: Write the proportion equation
125,929.40 : 188,456.70 = 115,431.80 : x - Step 2: Convert to fraction form
125,929.40/188,456.70 = 115,431.80/x - Step 3: Cross multiply
125,929.40x = 188,456.70 × 115,431.80 - Step 4: Simplify right side
125,929.40x = 21,753,896,103.06 - Step 5: Solve for x
x = 21,753,896,103.06/125,929.40 - Step 6: Final answer
x = 172,746.76
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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.