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Finding the Fourth Proportional to 123,758.68, 170,786.64 and 67,170.28

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Solution

The fourth proportional to 123,758.68, 170,786.64 and 67,170.28 is: 92,694.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,758.68 : 170,786.64 = 67,170.28 : x
  2. Step 2: Convert to fraction form
    123,758.68/170,786.64 = 67,170.28/x
  3. Step 3: Cross multiply
    123,758.68x = 170,786.64 × 67,170.28
  4. Step 4: Simplify right side
    123,758.68x = 11,471,786,429.06
  5. Step 5: Solve for x
    x = 11,471,786,429.06/123,758.68
  6. Step 6: Final answer
    x = 92,694.80

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1.5x scale

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.