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Finding the Fourth Proportional to 136.02, 204 and 81.93

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Solution

The fourth proportional to 136.02, 204 and 81.93 is: 122.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.02 : 204 = 81.93 : x
  2. Step 2: Convert to fraction form
    136.02/204 = 81.93/x
  3. Step 3: Cross multiply
    136.02x = 204 × 81.93
  4. Step 4: Simplify right side
    136.02x = 16,713.72
  5. Step 5: Solve for x
    x = 16,713.72/136.02
  6. Step 6: Final answer
    x = 122.88

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