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Finding the Fourth Proportional to 74,691.88, 103,073.56 and 40,700.78

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Solution

The fourth proportional to 74,691.88, 103,073.56 and 40,700.78 is: 56,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,691.88 : 103,073.56 = 40,700.78 : x
  2. Step 2: Convert to fraction form
    74,691.88/103,073.56 = 40,700.78/x
  3. Step 3: Cross multiply
    74,691.88x = 103,073.56 × 40,700.78
  4. Step 4: Simplify right side
    74,691.88x = 4,195,174,289.38
  5. Step 5: Solve for x
    x = 4,195,174,289.38/74,691.88
  6. Step 6: Final answer
    x = 56,166.40

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1.5x scale

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.