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Finding the Fourth Proportional to 81.73, 123.08 and 68.97

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Solution

The fourth proportional to 81.73, 123.08 and 68.97 is: 103.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.73 : 123.08 = 68.97 : x
  2. Step 2: Convert to fraction form
    81.73/123.08 = 68.97/x
  3. Step 3: Cross multiply
    81.73x = 123.08 × 68.97
  4. Step 4: Simplify right side
    81.73x = 8,489.14
  5. Step 5: Solve for x
    x = 8,489.14/81.73
  6. Step 6: Final answer
    x = 103.87

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