Finding the Fourth Proportional to 100,128.24, 138,175.56 and 54,805.68
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Solution
The fourth proportional to 100,128.24, 138,175.56 and 54,805.68 is: 75,631.07
Step by Step Solution
- Step 1: Write the proportion equation
100,128.24 : 138,175.56 = 54,805.68 : x - Step 2: Convert to fraction form
100,128.24/138,175.56 = 54,805.68/x - Step 3: Cross multiply
100,128.24x = 138,175.56 × 54,805.68 - Step 4: Simplify right side
100,128.24x = 7,572,805,525.18 - Step 5: Solve for x
x = 7,572,805,525.18/100,128.24 - Step 6: Final answer
x = 75,631.07
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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.