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Finding the Fourth Proportional to 81,869.82, 122,679.54 and 55,116.72

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Solution

The fourth proportional to 81,869.82, 122,679.54 and 55,116.72 is: 82,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,869.82 : 122,679.54 = 55,116.72 : x
  2. Step 2: Convert to fraction form
    81,869.82/122,679.54 = 55,116.72/x
  3. Step 3: Cross multiply
    81,869.82x = 122,679.54 × 55,116.72
  4. Step 4: Simplify right side
    81,869.82x = 6,761,693,855.91
  5. Step 5: Solve for x
    x = 6,761,693,855.91/81,869.82
  6. Step 6: Final answer
    x = 82,590.80

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