Finding the Fourth Proportional to 100,129.77, 138,179.13 and 54,807.99
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Solution
The fourth proportional to 100,129.77, 138,179.13 and 54,807.99 is: 75,635.05
Step by Step Solution
- Step 1: Write the proportion equation
100,129.77 : 138,179.13 = 54,807.99 : x - Step 2: Convert to fraction form
100,129.77/138,179.13 = 54,807.99/x - Step 3: Cross multiply
100,129.77x = 138,179.13 × 54,807.99 - Step 4: Simplify right side
100,129.77x = 7,573,320,375.25 - Step 5: Solve for x
x = 7,573,320,375.25/100,129.77 - Step 6: Final answer
x = 75,635.05
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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.