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Finding the Fourth Proportional to 135,865.20, 203,797.80 and 123,399.30

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Solution

The fourth proportional to 135,865.20, 203,797.80 and 123,399.30 is: 185,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,865.20 : 203,797.80 = 123,399.30 : x
  2. Step 2: Convert to fraction form
    135,865.20/203,797.80 = 123,399.30/x
  3. Step 3: Cross multiply
    135,865.20x = 203,797.80 × 123,399.30
  4. Step 4: Simplify right side
    135,865.20x = 25,148,505,861.54
  5. Step 5: Solve for x
    x = 25,148,505,861.54/135,865.20
  6. Step 6: Final answer
    x = 185,098.95

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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.