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Finding the Fourth Proportional to 74,691.81, 103,073.76 and 40,701.78

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Solution

The fourth proportional to 74,691.81, 103,073.76 and 40,701.78 is: 56,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,691.81 : 103,073.76 = 40,701.78 : x
  2. Step 2: Convert to fraction form
    74,691.81/103,073.76 = 40,701.78/x
  3. Step 3: Cross multiply
    74,691.81x = 103,073.76 × 40,701.78
  4. Step 4: Simplify right side
    74,691.81x = 4,195,285,503.29
  5. Step 5: Solve for x
    x = 4,195,285,503.29/74,691.81
  6. Step 6: Final answer
    x = 56,167.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.