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Finding the Fourth Proportional to 74,691.27, 103,076.55 and 40,702.55

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Solution

The fourth proportional to 74,691.27, 103,076.55 and 40,702.55 is: 56,170.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,691.27 : 103,076.55 = 40,702.55 : x
  2. Step 2: Convert to fraction form
    74,691.27/103,076.55 = 40,702.55/x
  3. Step 3: Cross multiply
    74,691.27x = 103,076.55 × 40,702.55
  4. Step 4: Simplify right side
    74,691.27x = 4,195,478,430.20
  5. Step 5: Solve for x
    x = 4,195,478,430.20/74,691.27
  6. Step 6: Final answer
    x = 56,170.93

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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.