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Finding the Fourth Proportional to 135,921.80, 203,493.90 and 83,433.80

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Solution

The fourth proportional to 135,921.80, 203,493.90 and 83,433.80 is: 124,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,921.80 : 203,493.90 = 83,433.80 : x
  2. Step 2: Convert to fraction form
    135,921.80/203,493.90 = 83,433.80/x
  3. Step 3: Cross multiply
    135,921.80x = 203,493.90 × 83,433.80
  4. Step 4: Simplify right side
    135,921.80x = 16,978,269,353.82
  5. Step 5: Solve for x
    x = 16,978,269,353.82/135,921.80
  6. Step 6: Final answer
    x = 124,912.04

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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.