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Finding the Fourth Proportional to 138.05, 207.07 and 41.87

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Solution

The fourth proportional to 138.05, 207.07 and 41.87 is: 62.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.05 : 207.07 = 41.87 : x
  2. Step 2: Convert to fraction form
    138.05/207.07 = 41.87/x
  3. Step 3: Cross multiply
    138.05x = 207.07 × 41.87
  4. Step 4: Simplify right side
    138.05x = 8,668.88
  5. Step 5: Solve for x
    x = 8,668.88/138.05
  6. Step 6: Final answer
    x = 62.79

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