Finding the Fourth Proportional to 138,171.75, 207,257.68 and 49,419.95
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Solution
The fourth proportional to 138,171.75, 207,257.68 and 49,419.95 is: 74,129.94
Step by Step Solution
- Step 1: Write the proportion equation
138,171.75 : 207,257.68 = 49,419.95 : x - Step 2: Convert to fraction form
138,171.75/207,257.68 = 49,419.95/x - Step 3: Cross multiply
138,171.75x = 207,257.68 × 49,419.95 - Step 4: Simplify right side
138,171.75x = 10,242,664,182.72 - Step 5: Solve for x
x = 10,242,664,182.72/138,171.75 - Step 6: Final answer
x = 74,129.94
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.