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Finding the Fourth Proportional to 132.10, 198.25 and 91.60

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Solution

The fourth proportional to 132.10, 198.25 and 91.60 is: 137.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.10 : 198.25 = 91.60 : x
  2. Step 2: Convert to fraction form
    132.10/198.25 = 91.60/x
  3. Step 3: Cross multiply
    132.10x = 198.25 × 91.60
  4. Step 4: Simplify right side
    132.10x = 18,158.98
  5. Step 5: Solve for x
    x = 18,158.98/132.10
  6. Step 6: Final answer
    x = 137.47

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