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Finding the Fourth Proportional to 84.60, 126.87 and 38.97

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Solution

The fourth proportional to 84.60, 126.87 and 38.97 is: 58.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.60 : 126.87 = 38.97 : x
  2. Step 2: Convert to fraction form
    84.60/126.87 = 38.97/x
  3. Step 3: Cross multiply
    84.60x = 126.87 × 38.97
  4. Step 4: Simplify right side
    84.60x = 4,944.12
  5. Step 5: Solve for x
    x = 4,944.12/84.60
  6. Step 6: Final answer
    x = 58.44

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