Finding the Fourth Proportional to 138,313.80, 207,470.70 and 85,169.70
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Solution
The fourth proportional to 138,313.80, 207,470.70 and 85,169.70 is: 127,754.55
Step by Step Solution
- Step 1: Write the proportion equation
138,313.80 : 207,470.70 = 85,169.70 : x - Step 2: Convert to fraction form
138,313.80/207,470.70 = 85,169.70/x - Step 3: Cross multiply
138,313.80x = 207,470.70 × 85,169.70 - Step 4: Simplify right side
138,313.80x = 17,670,217,277.79 - Step 5: Solve for x
x = 17,670,217,277.79/138,313.80 - Step 6: Final answer
x = 127,754.55
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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.