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Finding the Fourth Proportional to 131,449.80, 197,174.70 and 109,288.20

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Solution

The fourth proportional to 131,449.80, 197,174.70 and 109,288.20 is: 163,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,449.80 : 197,174.70 = 109,288.20 : x
  2. Step 2: Convert to fraction form
    131,449.80/197,174.70 = 109,288.20/x
  3. Step 3: Cross multiply
    131,449.80x = 197,174.70 × 109,288.20
  4. Step 4: Simplify right side
    131,449.80x = 21,548,868,048.54
  5. Step 5: Solve for x
    x = 21,548,868,048.54/131,449.80
  6. Step 6: Final answer
    x = 163,932.30

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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.