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Finding the Fourth Proportional to 96.82, 144.60 and 86.74

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Solution

The fourth proportional to 96.82, 144.60 and 86.74 is: 129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.82 : 144.60 = 86.74 : x
  2. Step 2: Convert to fraction form
    96.82/144.60 = 86.74/x
  3. Step 3: Cross multiply
    96.82x = 144.60 × 86.74
  4. Step 4: Simplify right side
    96.82x = 12,542.60
  5. Step 5: Solve for x
    x = 12,542.60/96.82
  6. Step 6: Final answer
    x = 129.55

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