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Finding the Fourth Proportional to 83,020.56, 123,939.66 and 80,104.56

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Solution

The fourth proportional to 83,020.56, 123,939.66 and 80,104.56 is: 119,586.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,020.56 : 123,939.66 = 80,104.56 : x
  2. Step 2: Convert to fraction form
    83,020.56/123,939.66 = 80,104.56/x
  3. Step 3: Cross multiply
    83,020.56x = 123,939.66 × 80,104.56
  4. Step 4: Simplify right side
    83,020.56x = 9,928,131,930.85
  5. Step 5: Solve for x
    x = 9,928,131,930.85/83,020.56
  6. Step 6: Final answer
    x = 119,586.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.