Finding the Fourth Proportional to 100,305.14, 138,418.08 and 54,982.13
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Solution
The fourth proportional to 100,305.14, 138,418.08 and 54,982.13 is: 75,873.69
Step by Step Solution
- Step 1: Write the proportion equation
100,305.14 : 138,418.08 = 54,982.13 : x - Step 2: Convert to fraction form
100,305.14/138,418.08 = 54,982.13/x - Step 3: Cross multiply
100,305.14x = 138,418.08 × 54,982.13 - Step 4: Simplify right side
100,305.14x = 7,610,520,868.91 - Step 5: Solve for x
x = 7,610,520,868.91/100,305.14 - Step 6: Final answer
x = 75,873.69
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1.5x scale
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.