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Finding the Fourth Proportional to 123,198.56, 170,013.52 and 66,609.92

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Solution

The fourth proportional to 123,198.56, 170,013.52 and 66,609.92 is: 91,921.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,198.56 : 170,013.52 = 66,609.92 : x
  2. Step 2: Convert to fraction form
    123,198.56/170,013.52 = 66,609.92/x
  3. Step 3: Cross multiply
    123,198.56x = 170,013.52 × 66,609.92
  4. Step 4: Simplify right side
    123,198.56x = 11,324,586,966.12
  5. Step 5: Solve for x
    x = 11,324,586,966.12/123,198.56
  6. Step 6: Final answer
    x = 91,921.42

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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.