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Finding the Fourth Proportional to 281.82, 422.63 and 99.17

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Solution

The fourth proportional to 281.82, 422.63 and 99.17 is: 148.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.82 : 422.63 = 99.17 : x
  2. Step 2: Convert to fraction form
    281.82/422.63 = 99.17/x
  3. Step 3: Cross multiply
    281.82x = 422.63 × 99.17
  4. Step 4: Simplify right side
    281.82x = 41,912.22
  5. Step 5: Solve for x
    x = 41,912.22/281.82
  6. Step 6: Final answer
    x = 148.72

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