Finding the Fourth Proportional to 138,369.13, 207,619.31 and 82,319.97
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Solution
The fourth proportional to 138,369.13, 207,619.31 and 82,319.97 is: 123,518.99
Step by Step Solution
- Step 1: Write the proportion equation
138,369.13 : 207,619.31 = 82,319.97 : x - Step 2: Convert to fraction form
138,369.13/207,619.31 = 82,319.97/x - Step 3: Cross multiply
138,369.13x = 207,619.31 × 82,319.97 - Step 4: Simplify right side
138,369.13x = 17,091,215,370.62 - Step 5: Solve for x
x = 17,091,215,370.62/138,369.13 - Step 6: Final answer
x = 123,518.99
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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.