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Finding the Fourth Proportional to 220,839.40, 331,404.90 and 126,069.40

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Solution

The fourth proportional to 220,839.40, 331,404.90 and 126,069.40 is: 189,187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,839.40 : 331,404.90 = 126,069.40 : x
  2. Step 2: Convert to fraction form
    220,839.40/331,404.90 = 126,069.40/x
  3. Step 3: Cross multiply
    220,839.40x = 331,404.90 × 126,069.40
  4. Step 4: Simplify right side
    220,839.40x = 41,780,016,900.06
  5. Step 5: Solve for x
    x = 41,780,016,900.06/220,839.40
  6. Step 6: Final answer
    x = 189,187.33

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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.