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Finding the Fourth Proportional to 80,424.40, 120,622.20 and 50,789.20

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Solution

The fourth proportional to 80,424.40, 120,622.20 and 50,789.20 is: 76,174.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,424.40 : 120,622.20 = 50,789.20 : x
  2. Step 2: Convert to fraction form
    80,424.40/120,622.20 = 50,789.20/x
  3. Step 3: Cross multiply
    80,424.40x = 120,622.20 × 50,789.20
  4. Step 4: Simplify right side
    80,424.40x = 6,126,305,040.24
  5. Step 5: Solve for x
    x = 6,126,305,040.24/80,424.40
  6. Step 6: Final answer
    x = 76,174.71

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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.