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Finding the Fourth Proportional to 81,021.60, 111,764.88 and 47,481.12

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Solution

The fourth proportional to 81,021.60, 111,764.88 and 47,481.12 is: 65,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,021.60 : 111,764.88 = 47,481.12 : x
  2. Step 2: Convert to fraction form
    81,021.60/111,764.88 = 47,481.12/x
  3. Step 3: Cross multiply
    81,021.60x = 111,764.88 × 47,481.12
  4. Step 4: Simplify right side
    81,021.60x = 5,306,721,679.07
  5. Step 5: Solve for x
    x = 5,306,721,679.07/81,021.60
  6. Step 6: Final answer
    x = 65,497.62

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