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Finding the Fourth Proportional to 132.12, 198.03 and 71.28

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Solution

The fourth proportional to 132.12, 198.03 and 71.28 is: 106.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.12 : 198.03 = 71.28 : x
  2. Step 2: Convert to fraction form
    132.12/198.03 = 71.28/x
  3. Step 3: Cross multiply
    132.12x = 198.03 × 71.28
  4. Step 4: Simplify right side
    132.12x = 14,115.58
  5. Step 5: Solve for x
    x = 14,115.58/132.12
  6. Step 6: Final answer
    x = 106.84

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