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Finding the Fourth Proportional to 80,638.21, 120,957.18 and 33,279.94

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Solution

The fourth proportional to 80,638.21, 120,957.18 and 33,279.94 is: 49,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,638.21 : 120,957.18 = 33,279.94 : x
  2. Step 2: Convert to fraction form
    80,638.21/120,957.18 = 33,279.94/x
  3. Step 3: Cross multiply
    80,638.21x = 120,957.18 × 33,279.94
  4. Step 4: Simplify right side
    80,638.21x = 4,025,447,692.97
  5. Step 5: Solve for x
    x = 4,025,447,692.97/80,638.21
  6. Step 6: Final answer
    x = 49,919.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.