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Finding the Fourth Proportional to 138,620.43, 206,927.82 and 121,805.28

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Solution

The fourth proportional to 138,620.43, 206,927.82 and 121,805.28 is: 181,826.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.43 : 206,927.82 = 121,805.28 : x
  2. Step 2: Convert to fraction form
    138,620.43/206,927.82 = 121,805.28/x
  3. Step 3: Cross multiply
    138,620.43x = 206,927.82 × 121,805.28
  4. Step 4: Simplify right side
    138,620.43x = 25,204,901,054.89
  5. Step 5: Solve for x
    x = 25,204,901,054.89/138,620.43
  6. Step 6: Final answer
    x = 181,826.74

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