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Finding the Fourth Proportional to 74,472.30, 111,708.45 and 68,769.90

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Solution

The fourth proportional to 74,472.30, 111,708.45 and 68,769.90 is: 103,154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,472.30 : 111,708.45 = 68,769.90 : x
  2. Step 2: Convert to fraction form
    74,472.30/111,708.45 = 68,769.90/x
  3. Step 3: Cross multiply
    74,472.30x = 111,708.45 × 68,769.90
  4. Step 4: Simplify right side
    74,472.30x = 7,682,178,935.66
  5. Step 5: Solve for x
    x = 7,682,178,935.66/74,472.30
  6. Step 6: Final answer
    x = 103,154.85

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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.