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Finding the Fourth Proportional to 321,128.72, 481,429.92 and 121,335.44

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Solution

The fourth proportional to 321,128.72, 481,429.92 and 121,335.44 is: 181,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,128.72 : 481,429.92 = 121,335.44 : x
  2. Step 2: Convert to fraction form
    321,128.72/481,429.92 = 121,335.44/x
  3. Step 3: Cross multiply
    321,128.72x = 481,429.92 × 121,335.44
  4. Step 4: Simplify right side
    321,128.72x = 58,414,511,172.36
  5. Step 5: Solve for x
    x = 58,414,511,172.36/321,128.72
  6. Step 6: Final answer
    x = 181,903.73

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