Finding the Fourth Proportional to 207,661.26, 311,517.70 and 81,285.06
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Solution
The fourth proportional to 207,661.26, 311,517.70 and 81,285.06 is: 121,937.69
Step by Step Solution
- Step 1: Write the proportion equation
207,661.26 : 311,517.70 = 81,285.06 : x - Step 2: Convert to fraction form
207,661.26/311,517.70 = 81,285.06/x - Step 3: Cross multiply
207,661.26x = 311,517.70 × 81,285.06 - Step 4: Simplify right side
207,661.26x = 25,321,734,935.56 - Step 5: Solve for x
x = 25,321,734,935.56/207,661.26 - Step 6: Final answer
x = 121,937.69
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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.