Finding the Fourth Proportional to 138,368.13, 207,617.81 and 82,318.97
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Solution
The fourth proportional to 138,368.13, 207,617.81 and 82,318.97 is: 123,517.48
Step by Step Solution
- Step 1: Write the proportion equation
138,368.13 : 207,617.81 = 82,318.97 : x - Step 2: Convert to fraction form
138,368.13/207,617.81 = 82,318.97/x - Step 3: Cross multiply
138,368.13x = 207,617.81 × 82,318.97 - Step 4: Simplify right side
138,368.13x = 17,090,882,823.17 - Step 5: Solve for x
x = 17,090,882,823.17/138,368.13 - Step 6: Final answer
x = 123,517.48
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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.