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Finding the Fourth Proportional to 143.54, 215.46 and 82.79

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Solution

The fourth proportional to 143.54, 215.46 and 82.79 is: 124.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.54 : 215.46 = 82.79 : x
  2. Step 2: Convert to fraction form
    143.54/215.46 = 82.79/x
  3. Step 3: Cross multiply
    143.54x = 215.46 × 82.79
  4. Step 4: Simplify right side
    143.54x = 17,837.66
  5. Step 5: Solve for x
    x = 17,837.66/143.54
  6. Step 6: Final answer
    x = 124.27

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