Home / 80,420.40-120,616.20-50,785.20

Finding the Fourth Proportional to 80,420.40, 120,616.20 and 50,785.20

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Solution

The fourth proportional to 80,420.40, 120,616.20 and 50,785.20 is: 76,168.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,420.40 : 120,616.20 = 50,785.20 : x
  2. Step 2: Convert to fraction form
    80,420.40/120,616.20 = 50,785.20/x
  3. Step 3: Cross multiply
    80,420.40x = 120,616.20 × 50,785.20
  4. Step 4: Simplify right side
    80,420.40x = 6,125,517,840.24
  5. Step 5: Solve for x
    x = 6,125,517,840.24/80,420.40
  6. Step 6: Final answer
    x = 76,168.71

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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.