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Finding the Fourth Proportional to 80,065.28, 120,097.92 and 20,900.44

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Solution

The fourth proportional to 80,065.28, 120,097.92 and 20,900.44 is: 31,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,065.28 : 120,097.92 = 20,900.44 : x
  2. Step 2: Convert to fraction form
    80,065.28/120,097.92 = 20,900.44/x
  3. Step 3: Cross multiply
    80,065.28x = 120,097.92 × 20,900.44
  4. Step 4: Simplify right side
    80,065.28x = 2,510,099,371.08
  5. Step 5: Solve for x
    x = 2,510,099,371.08/80,065.28
  6. Step 6: Final answer
    x = 31,350.66

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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.