Home / 113,489.31-156,348.85-78,974.70

Finding the Fourth Proportional to 113,489.31, 156,348.85 and 78,974.70

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Solution

The fourth proportional to 113,489.31, 156,348.85 and 78,974.70 is: 108,799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,489.31 : 156,348.85 = 78,974.70 : x
  2. Step 2: Convert to fraction form
    113,489.31/156,348.85 = 78,974.70/x
  3. Step 3: Cross multiply
    113,489.31x = 156,348.85 × 78,974.70
  4. Step 4: Simplify right side
    113,489.31x = 12,347,603,717.53
  5. Step 5: Solve for x
    x = 12,347,603,717.53/113,489.31
  6. Step 6: Final answer
    x = 108,799.71

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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.