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Finding the Fourth Proportional to 121.81, 182.58 and 67.69

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Solution

The fourth proportional to 121.81, 182.58 and 67.69 is: 101.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.81 : 182.58 = 67.69 : x
  2. Step 2: Convert to fraction form
    121.81/182.58 = 67.69/x
  3. Step 3: Cross multiply
    121.81x = 182.58 × 67.69
  4. Step 4: Simplify right side
    121.81x = 12,358.84
  5. Step 5: Solve for x
    x = 12,358.84/121.81
  6. Step 6: Final answer
    x = 101.46

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