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Finding the Fourth Proportional to 83,640.99, 115,446.69 and 51,791.79

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Solution

The fourth proportional to 83,640.99, 115,446.69 and 51,791.79 is: 71,486.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.99 : 115,446.69 = 51,791.79 : x
  2. Step 2: Convert to fraction form
    83,640.99/115,446.69 = 51,791.79/x
  3. Step 3: Cross multiply
    83,640.99x = 115,446.69 × 51,791.79
  4. Step 4: Simplify right side
    83,640.99x = 5,979,190,724.68
  5. Step 5: Solve for x
    x = 5,979,190,724.68/83,640.99
  6. Step 6: Final answer
    x = 71,486.37

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