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Finding the Fourth Proportional to 123,758.13, 170,786.67 and 67,169.50

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Solution

The fourth proportional to 123,758.13, 170,786.67 and 67,169.50 is: 92,694.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,758.13 : 170,786.67 = 67,169.50 : x
  2. Step 2: Convert to fraction form
    123,758.13/170,786.67 = 67,169.50/x
  3. Step 3: Cross multiply
    123,758.13x = 170,786.67 × 67,169.50
  4. Step 4: Simplify right side
    123,758.13x = 11,471,655,062.64
  5. Step 5: Solve for x
    x = 11,471,655,062.64/123,758.13
  6. Step 6: Final answer
    x = 92,694.16

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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.