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Finding the Fourth Proportional to 217, 299.47 and 129.73

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Solution

The fourth proportional to 217, 299.47 and 129.73 is: 179.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    217 : 299.47 = 129.73 : x
  2. Step 2: Convert to fraction form
    217/299.47 = 129.73/x
  3. Step 3: Cross multiply
    217x = 299.47 × 129.73
  4. Step 4: Simplify right side
    217x = 38,850.24
  5. Step 5: Solve for x
    x = 38,850.24/217
  6. Step 6: Final answer
    x = 179.03

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