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Finding the Fourth Proportional to 80,169.60, 120,254.40 and 38,620.80

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Solution

The fourth proportional to 80,169.60, 120,254.40 and 38,620.80 is: 57,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,169.60 : 120,254.40 = 38,620.80 : x
  2. Step 2: Convert to fraction form
    80,169.60/120,254.40 = 38,620.80/x
  3. Step 3: Cross multiply
    80,169.60x = 120,254.40 × 38,620.80
  4. Step 4: Simplify right side
    80,169.60x = 4,644,321,131.52
  5. Step 5: Solve for x
    x = 4,644,321,131.52/80,169.60
  6. Step 6: Final answer
    x = 57,931.20

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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.