Finding the Fourth Proportional to 100,163.14, 138,231.80 and 57,724.41
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Solution
The fourth proportional to 100,163.14, 138,231.80 and 57,724.41 is: 79,663.53
Step by Step Solution
- Step 1: Write the proportion equation
100,163.14 : 138,231.80 = 57,724.41 : x - Step 2: Convert to fraction form
100,163.14/138,231.80 = 57,724.41/x - Step 3: Cross multiply
100,163.14x = 138,231.80 × 57,724.41 - Step 4: Simplify right side
100,163.14x = 7,979,349,098.24 - Step 5: Solve for x
x = 7,979,349,098.24/100,163.14 - Step 6: Final answer
x = 79,663.53
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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.