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Finding the Fourth Proportional to 204.90, 307.34 and 67.91

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Solution

The fourth proportional to 204.90, 307.34 and 67.91 is: 101.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.90 : 307.34 = 67.91 : x
  2. Step 2: Convert to fraction form
    204.90/307.34 = 67.91/x
  3. Step 3: Cross multiply
    204.90x = 307.34 × 67.91
  4. Step 4: Simplify right side
    204.90x = 20,869.84
  5. Step 5: Solve for x
    x = 20,869.84/204.90
  6. Step 6: Final answer
    x = 101.86

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