Home / 80,439.20-120,693.36-57,214.88

Finding the Fourth Proportional to 80,439.20, 120,693.36 and 57,214.88

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Solution

The fourth proportional to 80,439.20, 120,693.36 and 57,214.88 is: 85,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,439.20 : 120,693.36 = 57,214.88 : x
  2. Step 2: Convert to fraction form
    80,439.20/120,693.36 = 57,214.88/x
  3. Step 3: Cross multiply
    80,439.20x = 120,693.36 × 57,214.88
  4. Step 4: Simplify right side
    80,439.20x = 6,905,456,109.20
  5. Step 5: Solve for x
    x = 6,905,456,109.20/80,439.20
  6. Step 6: Final answer
    x = 85,846.90

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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.