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Finding the Fourth Proportional to 51.21, 76.82 and 39.27

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Solution

The fourth proportional to 51.21, 76.82 and 39.27 is: 58.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.21 : 76.82 = 39.27 : x
  2. Step 2: Convert to fraction form
    51.21/76.82 = 39.27/x
  3. Step 3: Cross multiply
    51.21x = 76.82 × 39.27
  4. Step 4: Simplify right side
    51.21x = 3,016.72
  5. Step 5: Solve for x
    x = 3,016.72/51.21
  6. Step 6: Final answer
    x = 58.91

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