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Finding the Fourth Proportional to 91,976.31, 126,928.42 and 51,687.72

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Solution

The fourth proportional to 91,976.31, 126,928.42 and 51,687.72 is: 71,329.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,976.31 : 126,928.42 = 51,687.72 : x
  2. Step 2: Convert to fraction form
    91,976.31/126,928.42 = 51,687.72/x
  3. Step 3: Cross multiply
    91,976.31x = 126,928.42 × 51,687.72
  4. Step 4: Simplify right side
    91,976.31x = 6,560,640,503.78
  5. Step 5: Solve for x
    x = 6,560,640,503.78/91,976.31
  6. Step 6: Final answer
    x = 71,329.68

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