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Finding the Fourth Proportional to 80,081.60, 120,122.40 and 38,532.80

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Solution

The fourth proportional to 80,081.60, 120,122.40 and 38,532.80 is: 57,799.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,081.60 : 120,122.40 = 38,532.80 : x
  2. Step 2: Convert to fraction form
    80,081.60/120,122.40 = 38,532.80/x
  3. Step 3: Cross multiply
    80,081.60x = 120,122.40 × 38,532.80
  4. Step 4: Simplify right side
    80,081.60x = 4,628,652,414.72
  5. Step 5: Solve for x
    x = 4,628,652,414.72/80,081.60
  6. Step 6: Final answer
    x = 57,799.20

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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.