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Finding the Fourth Proportional to 74,251.80, 111,356.10 and 40,987.80

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Solution

The fourth proportional to 74,251.80, 111,356.10 and 40,987.80 is: 61,469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,251.80 : 111,356.10 = 40,987.80 : x
  2. Step 2: Convert to fraction form
    74,251.80/111,356.10 = 40,987.80/x
  3. Step 3: Cross multiply
    74,251.80x = 111,356.10 × 40,987.80
  4. Step 4: Simplify right side
    74,251.80x = 4,564,241,555.58
  5. Step 5: Solve for x
    x = 4,564,241,555.58/74,251.80
  6. Step 6: Final answer
    x = 61,469.78

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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.