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Finding the Fourth Proportional to 219,861.20, 329,791.80 and 131,214.80

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Solution

The fourth proportional to 219,861.20, 329,791.80 and 131,214.80 is: 196,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,861.20 : 329,791.80 = 131,214.80 : x
  2. Step 2: Convert to fraction form
    219,861.20/329,791.80 = 131,214.80/x
  3. Step 3: Cross multiply
    219,861.20x = 329,791.80 × 131,214.80
  4. Step 4: Simplify right side
    219,861.20x = 43,273,565,078.64
  5. Step 5: Solve for x
    x = 43,273,565,078.64/219,861.20
  6. Step 6: Final answer
    x = 196,822.20

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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.