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Finding the Fourth Proportional to 74,671.43, 103,046.16 and 40,679.85

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Solution

The fourth proportional to 74,671.43, 103,046.16 and 40,679.85 is: 56,137.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,671.43 : 103,046.16 = 40,679.85 : x
  2. Step 2: Convert to fraction form
    74,671.43/103,046.16 = 40,679.85/x
  3. Step 3: Cross multiply
    74,671.43x = 103,046.16 × 40,679.85
  4. Step 4: Simplify right side
    74,671.43x = 4,191,901,772.57
  5. Step 5: Solve for x
    x = 4,191,901,772.57/74,671.43
  6. Step 6: Final answer
    x = 56,137.96

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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.