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Finding the Fourth Proportional to 100,760.96, 138,936.47 and 77,738.33

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Solution

The fourth proportional to 100,760.96, 138,936.47 and 77,738.33 is: 107,191.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,760.96 : 138,936.47 = 77,738.33 : x
  2. Step 2: Convert to fraction form
    100,760.96/138,936.47 = 77,738.33/x
  3. Step 3: Cross multiply
    100,760.96x = 138,936.47 × 77,738.33
  4. Step 4: Simplify right side
    100,760.96x = 10,800,689,112.54
  5. Step 5: Solve for x
    x = 10,800,689,112.54/100,760.96
  6. Step 6: Final answer
    x = 107,191.21

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