Finding the Fourth Proportional to 100,036.96, 138,101.14 and 77,324.62
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Solution
The fourth proportional to 100,036.96, 138,101.14 and 77,324.62 is: 106,746.73
Step by Step Solution
- Step 1: Write the proportion equation
100,036.96 : 138,101.14 = 77,324.62 : x - Step 2: Convert to fraction form
100,036.96/138,101.14 = 77,324.62/x - Step 3: Cross multiply
100,036.96x = 138,101.14 × 77,324.62 - Step 4: Simplify right side
100,036.96x = 10,678,618,172.07 - Step 5: Solve for x
x = 10,678,618,172.07/100,036.96 - Step 6: Final answer
x = 106,746.73
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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.