Finding the Fourth Proportional to 100,238.73, 138,331.31 and 54,915.99
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Solution
The fourth proportional to 100,238.73, 138,331.31 and 54,915.99 is: 75,785.08
Step by Step Solution
- Step 1: Write the proportion equation
100,238.73 : 138,331.31 = 54,915.99 : x - Step 2: Convert to fraction form
100,238.73/138,331.31 = 54,915.99/x - Step 3: Cross multiply
100,238.73x = 138,331.31 × 54,915.99 - Step 4: Simplify right side
100,238.73x = 7,596,600,562.07 - Step 5: Solve for x
x = 7,596,600,562.07/100,238.73 - Step 6: Final answer
x = 75,785.08
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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.