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Finding the Fourth Proportional to 230,388.73, 317,939.97 and 128,411.35

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Solution

The fourth proportional to 230,388.73, 317,939.97 and 128,411.35 is: 177,209.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,388.73 : 317,939.97 = 128,411.35 : x
  2. Step 2: Convert to fraction form
    230,388.73/317,939.97 = 128,411.35/x
  3. Step 3: Cross multiply
    230,388.73x = 317,939.97 × 128,411.35
  4. Step 4: Simplify right side
    230,388.73x = 40,827,100,766.66
  5. Step 5: Solve for x
    x = 40,827,100,766.66/230,388.73
  6. Step 6: Final answer
    x = 177,209.63

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