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Finding the Fourth Proportional to 135,903.40, 203,855.10 and 126,061.90

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Solution

The fourth proportional to 135,903.40, 203,855.10 and 126,061.90 is: 189,092.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,903.40 : 203,855.10 = 126,061.90 : x
  2. Step 2: Convert to fraction form
    135,903.40/203,855.10 = 126,061.90/x
  3. Step 3: Cross multiply
    135,903.40x = 203,855.10 × 126,061.90
  4. Step 4: Simplify right side
    135,903.40x = 25,698,361,230.69
  5. Step 5: Solve for x
    x = 25,698,361,230.69/135,903.40
  6. Step 6: Final answer
    x = 189,092.85

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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.