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Finding the Fourth Proportional to 231,661.64, 319,677.41 and 128,288.41

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Solution

The fourth proportional to 231,661.64, 319,677.41 and 128,288.41 is: 177,029.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,661.64 : 319,677.41 = 128,288.41 : x
  2. Step 2: Convert to fraction form
    231,661.64/319,677.41 = 128,288.41/x
  3. Step 3: Cross multiply
    231,661.64x = 319,677.41 × 128,288.41
  4. Step 4: Simplify right side
    231,661.64x = 41,010,906,163.35
  5. Step 5: Solve for x
    x = 41,010,906,163.35/231,661.64
  6. Step 6: Final answer
    x = 177,029.33

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