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Finding the Fourth Proportional to 136.77, 205 and 68.25

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Solution

The fourth proportional to 136.77, 205 and 68.25 is: 102.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.77 : 205 = 68.25 : x
  2. Step 2: Convert to fraction form
    136.77/205 = 68.25/x
  3. Step 3: Cross multiply
    136.77x = 205 × 68.25
  4. Step 4: Simplify right side
    136.77x = 13,991.25
  5. Step 5: Solve for x
    x = 13,991.25/136.77
  6. Step 6: Final answer
    x = 102.30

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