Finding the Fourth Proportional to 100,439.34, 138,571.97 and 57,387.95
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Solution
The fourth proportional to 100,439.34, 138,571.97 and 57,387.95 is: 79,175.75
Step by Step Solution
- Step 1: Write the proportion equation
100,439.34 : 138,571.97 = 57,387.95 : x - Step 2: Convert to fraction form
100,439.34/138,571.97 = 57,387.95/x - Step 3: Cross multiply
100,439.34x = 138,571.97 × 57,387.95 - Step 4: Simplify right side
100,439.34x = 7,952,360,305.96 - Step 5: Solve for x
x = 7,952,360,305.96/100,439.34 - Step 6: Final answer
x = 79,175.75
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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.