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Finding the Fourth Proportional to 77.83, 116.59 and 69.36

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Solution

The fourth proportional to 77.83, 116.59 and 69.36 is: 103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.83 : 116.59 = 69.36 : x
  2. Step 2: Convert to fraction form
    77.83/116.59 = 69.36/x
  3. Step 3: Cross multiply
    77.83x = 116.59 × 69.36
  4. Step 4: Simplify right side
    77.83x = 8,086.68
  5. Step 5: Solve for x
    x = 8,086.68/77.83
  6. Step 6: Final answer
    x = 103.90

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