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Finding the Fourth Proportional to 139.73, 192.83 and 84.47

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Solution

The fourth proportional to 139.73, 192.83 and 84.47 is: 116.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.73 : 192.83 = 84.47 : x
  2. Step 2: Convert to fraction form
    139.73/192.83 = 84.47/x
  3. Step 3: Cross multiply
    139.73x = 192.83 × 84.47
  4. Step 4: Simplify right side
    139.73x = 16,286.96
  5. Step 5: Solve for x
    x = 16,286.96/139.73
  6. Step 6: Final answer
    x = 116.56

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