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Finding the Fourth Proportional to 74,073.56, 111,127.78 and 42,503.87

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Solution

The fourth proportional to 74,073.56, 111,127.78 and 42,503.87 is: 63,765.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,073.56 : 111,127.78 = 42,503.87 : x
  2. Step 2: Convert to fraction form
    74,073.56/111,127.78 = 42,503.87/x
  3. Step 3: Cross multiply
    74,073.56x = 111,127.78 × 42,503.87
  4. Step 4: Simplify right side
    74,073.56x = 4,723,361,045.46
  5. Step 5: Solve for x
    x = 4,723,361,045.46/74,073.56
  6. Step 6: Final answer
    x = 63,765.82

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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.