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Finding the Fourth Proportional to 83,108.80, 124,663.20 and 74,123.20

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Solution

The fourth proportional to 83,108.80, 124,663.20 and 74,123.20 is: 111,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,108.80 : 124,663.20 = 74,123.20 : x
  2. Step 2: Convert to fraction form
    83,108.80/124,663.20 = 74,123.20/x
  3. Step 3: Cross multiply
    83,108.80x = 124,663.20 × 74,123.20
  4. Step 4: Simplify right side
    83,108.80x = 9,240,435,306.24
  5. Step 5: Solve for x
    x = 9,240,435,306.24/83,108.80
  6. Step 6: Final answer
    x = 111,184.80

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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.