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Finding the Fourth Proportional to 165.44, 248.21 and 79.88

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Solution

The fourth proportional to 165.44, 248.21 and 79.88 is: 119.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.44 : 248.21 = 79.88 : x
  2. Step 2: Convert to fraction form
    165.44/248.21 = 79.88/x
  3. Step 3: Cross multiply
    165.44x = 248.21 × 79.88
  4. Step 4: Simplify right side
    165.44x = 19,825.97
  5. Step 5: Solve for x
    x = 19,825.97/165.44
  6. Step 6: Final answer
    x = 119.84

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