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Finding the Fourth Proportional to 131,287.20, 196,639.20 and 113,791.20

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Solution

The fourth proportional to 131,287.20, 196,639.20 and 113,791.20 is: 170,434.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,287.20 : 196,639.20 = 113,791.20 : x
  2. Step 2: Convert to fraction form
    131,287.20/196,639.20 = 113,791.20/x
  3. Step 3: Cross multiply
    131,287.20x = 196,639.20 × 113,791.20
  4. Step 4: Simplify right side
    131,287.20x = 22,375,810,535.04
  5. Step 5: Solve for x
    x = 22,375,810,535.04/131,287.20
  6. Step 6: Final answer
    x = 170,434.06

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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.