Finding the Fourth Proportional to 138,149.68, 207,224.52 and 91,391.62
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Solution
The fourth proportional to 138,149.68, 207,224.52 and 91,391.62 is: 137,087.43
Step by Step Solution
- Step 1: Write the proportion equation
138,149.68 : 207,224.52 = 91,391.62 : x - Step 2: Convert to fraction form
138,149.68/207,224.52 = 91,391.62/x - Step 3: Cross multiply
138,149.68x = 207,224.52 × 91,391.62 - Step 4: Simplify right side
138,149.68x = 18,938,584,586.52 - Step 5: Solve for x
x = 18,938,584,586.52/138,149.68 - Step 6: Final answer
x = 137,087.43
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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.