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Finding the Fourth Proportional to 83,251.80, 124,513.20 and 74,430.90

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Solution

The fourth proportional to 83,251.80, 124,513.20 and 74,430.90 is: 111,320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,251.80 : 124,513.20 = 74,430.90 : x
  2. Step 2: Convert to fraction form
    83,251.80/124,513.20 = 74,430.90/x
  3. Step 3: Cross multiply
    83,251.80x = 124,513.20 × 74,430.90
  4. Step 4: Simplify right side
    83,251.80x = 9,267,629,537.88
  5. Step 5: Solve for x
    x = 9,267,629,537.88/83,251.80
  6. Step 6: Final answer
    x = 111,320.47

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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.