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Finding the Fourth Proportional to 158,107.87, 218,186.02 and 86,487.27

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Solution

The fourth proportional to 158,107.87, 218,186.02 and 86,487.27 is: 119,350.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,107.87 : 218,186.02 = 86,487.27 : x
  2. Step 2: Convert to fraction form
    158,107.87/218,186.02 = 86,487.27/x
  3. Step 3: Cross multiply
    158,107.87x = 218,186.02 × 86,487.27
  4. Step 4: Simplify right side
    158,107.87x = 18,870,313,221.97
  5. Step 5: Solve for x
    x = 18,870,313,221.97/158,107.87
  6. Step 6: Final answer
    x = 119,350.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.