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Finding the Fourth Proportional to 88,251.80, 121,789.34 and 54,279.50

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Solution

The fourth proportional to 88,251.80, 121,789.34 and 54,279.50 is: 74,906.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,251.80 : 121,789.34 = 54,279.50 : x
  2. Step 2: Convert to fraction form
    88,251.80/121,789.34 = 54,279.50/x
  3. Step 3: Cross multiply
    88,251.80x = 121,789.34 × 54,279.50
  4. Step 4: Simplify right side
    88,251.80x = 6,610,664,480.53
  5. Step 5: Solve for x
    x = 6,610,664,480.53/88,251.80
  6. Step 6: Final answer
    x = 74,906.85

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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.