Finding the Fourth Proportional to 138,299.70, 207,449.55 and 131,387.70
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Solution
The fourth proportional to 138,299.70, 207,449.55 and 131,387.70 is: 197,081.55
Step by Step Solution
- Step 1: Write the proportion equation
138,299.70 : 207,449.55 = 131,387.70 : x - Step 2: Convert to fraction form
138,299.70/207,449.55 = 131,387.70/x - Step 3: Cross multiply
138,299.70x = 207,449.55 × 131,387.70 - Step 4: Simplify right side
138,299.70x = 27,256,319,240.54 - Step 5: Solve for x
x = 27,256,319,240.54/138,299.70 - Step 6: Final answer
x = 197,081.55
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1.5x scale
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.