Finding the Fourth Proportional to 138,132.56, 207,198.84 and 91,374.50
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Solution
The fourth proportional to 138,132.56, 207,198.84 and 91,374.50 is: 137,061.75
Step by Step Solution
- Step 1: Write the proportion equation
138,132.56 : 207,198.84 = 91,374.50 : x - Step 2: Convert to fraction form
138,132.56/207,198.84 = 91,374.50/x - Step 3: Cross multiply
138,132.56x = 207,198.84 × 91,374.50 - Step 4: Simplify right side
138,132.56x = 18,932,689,369.59 - Step 5: Solve for x
x = 18,932,689,369.59/138,132.56 - Step 6: Final answer
x = 137,061.75
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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.