Finding the Fourth Proportional to 138,604.80, 207,907.20 and 82,471.80
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Solution
The fourth proportional to 138,604.80, 207,907.20 and 82,471.80 is: 123,707.70
Step by Step Solution
- Step 1: Write the proportion equation
138,604.80 : 207,907.20 = 82,471.80 : x - Step 2: Convert to fraction form
138,604.80/207,907.20 = 82,471.80/x - Step 3: Cross multiply
138,604.80x = 207,907.20 × 82,471.80 - Step 4: Simplify right side
138,604.80x = 17,146,481,016.96 - Step 5: Solve for x
x = 17,146,481,016.96/138,604.80 - Step 6: Final answer
x = 123,707.70
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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.