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Finding the Fourth Proportional to 126.29, 189.20 and 103.61

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Solution

The fourth proportional to 126.29, 189.20 and 103.61 is: 155.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.29 : 189.20 = 103.61 : x
  2. Step 2: Convert to fraction form
    126.29/189.20 = 103.61/x
  3. Step 3: Cross multiply
    126.29x = 189.20 × 103.61
  4. Step 4: Simplify right side
    126.29x = 19,603.74
  5. Step 5: Solve for x
    x = 19,603.74/126.29
  6. Step 6: Final answer
    x = 155.22

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