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Finding the Fourth Proportional to 281.61, 422.38 and 89.23

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Solution

The fourth proportional to 281.61, 422.38 and 89.23 is: 133.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.61 : 422.38 = 89.23 : x
  2. Step 2: Convert to fraction form
    281.61/422.38 = 89.23/x
  3. Step 3: Cross multiply
    281.61x = 422.38 × 89.23
  4. Step 4: Simplify right side
    281.61x = 37,688.97
  5. Step 5: Solve for x
    x = 37,688.97/281.61
  6. Step 6: Final answer
    x = 133.83

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