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Finding the Fourth Proportional to 220,131.40, 330,542.70 and 126,819.40

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Solution

The fourth proportional to 220,131.40, 330,542.70 and 126,819.40 is: 190,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,131.40 : 330,542.70 = 126,819.40 : x
  2. Step 2: Convert to fraction form
    220,131.40/330,542.70 = 126,819.40/x
  3. Step 3: Cross multiply
    220,131.40x = 330,542.70 × 126,819.40
  4. Step 4: Simplify right side
    220,131.40x = 41,919,226,888.38
  5. Step 5: Solve for x
    x = 41,919,226,888.38/220,131.40
  6. Step 6: Final answer
    x = 190,428.20

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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.