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Finding the Fourth Proportional to 131,443.20, 196,873.20 and 108,115.20

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Solution

The fourth proportional to 131,443.20, 196,873.20 and 108,115.20 is: 161,932.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,443.20 : 196,873.20 = 108,115.20 : x
  2. Step 2: Convert to fraction form
    131,443.20/196,873.20 = 108,115.20/x
  3. Step 3: Cross multiply
    131,443.20x = 196,873.20 × 108,115.20
  4. Step 4: Simplify right side
    131,443.20x = 21,284,985,392.64
  5. Step 5: Solve for x
    x = 21,284,985,392.64/131,443.20
  6. Step 6: Final answer
    x = 161,932.95

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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.