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Finding the Fourth Proportional to 126.71, 174.85 and 77.58

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Solution

The fourth proportional to 126.71, 174.85 and 77.58 is: 107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.71 : 174.85 = 77.58 : x
  2. Step 2: Convert to fraction form
    126.71/174.85 = 77.58/x
  3. Step 3: Cross multiply
    126.71x = 174.85 × 77.58
  4. Step 4: Simplify right side
    126.71x = 13,565.49
  5. Step 5: Solve for x
    x = 13,565.49/126.71
  6. Step 6: Final answer
    x = 107.06

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