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Finding the Fourth Proportional to 144.29, 199.12 and 78.80

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Solution

The fourth proportional to 144.29, 199.12 and 78.80 is: 108.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.29 : 199.12 = 78.80 : x
  2. Step 2: Convert to fraction form
    144.29/199.12 = 78.80/x
  3. Step 3: Cross multiply
    144.29x = 199.12 × 78.80
  4. Step 4: Simplify right side
    144.29x = 15,689.66
  5. Step 5: Solve for x
    x = 15,689.66/144.29
  6. Step 6: Final answer
    x = 108.74

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