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Finding the Fourth Proportional to 131,473.20, 196,918.20 and 108,145.20

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Solution

The fourth proportional to 131,473.20, 196,918.20 and 108,145.20 is: 161,977.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,473.20 : 196,918.20 = 108,145.20 : x
  2. Step 2: Convert to fraction form
    131,473.20/196,918.20 = 108,145.20/x
  3. Step 3: Cross multiply
    131,473.20x = 196,918.20 × 108,145.20
  4. Step 4: Simplify right side
    131,473.20x = 21,295,758,122.64
  5. Step 5: Solve for x
    x = 21,295,758,122.64/131,473.20
  6. Step 6: Final answer
    x = 161,977.94

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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.