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Finding the Fourth Proportional to 81,491.73, 122,048.06 and 79,249.47

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Solution

The fourth proportional to 81,491.73, 122,048.06 and 79,249.47 is: 118,689.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,491.73 : 122,048.06 = 79,249.47 : x
  2. Step 2: Convert to fraction form
    81,491.73/122,048.06 = 79,249.47/x
  3. Step 3: Cross multiply
    81,491.73x = 122,048.06 × 79,249.47
  4. Step 4: Simplify right side
    81,491.73x = 9,672,243,673.28
  5. Step 5: Solve for x
    x = 9,672,243,673.28/81,491.73
  6. Step 6: Final answer
    x = 118,689.88

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