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Finding the Fourth Proportional to 131,447.20, 196,879.20 and 108,119.20

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Solution

The fourth proportional to 131,447.20, 196,879.20 and 108,119.20 is: 161,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,447.20 : 196,879.20 = 108,119.20 : x
  2. Step 2: Convert to fraction form
    131,447.20/196,879.20 = 108,119.20/x
  3. Step 3: Cross multiply
    131,447.20x = 196,879.20 × 108,119.20
  4. Step 4: Simplify right side
    131,447.20x = 21,286,421,600.64
  5. Step 5: Solve for x
    x = 21,286,421,600.64/131,447.20
  6. Step 6: Final answer
    x = 161,938.95

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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.