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Finding the Fourth Proportional to 139.01, 208.24 and 106.79

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Solution

The fourth proportional to 139.01, 208.24 and 106.79 is: 159.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.01 : 208.24 = 106.79 : x
  2. Step 2: Convert to fraction form
    139.01/208.24 = 106.79/x
  3. Step 3: Cross multiply
    139.01x = 208.24 × 106.79
  4. Step 4: Simplify right side
    139.01x = 22,237.95
  5. Step 5: Solve for x
    x = 22,237.95/139.01
  6. Step 6: Final answer
    x = 159.97

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