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Finding the Fourth Proportional to 81,744.80, 122,455.20 and 72,003.20

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Solution

The fourth proportional to 81,744.80, 122,455.20 and 72,003.20 is: 107,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,744.80 : 122,455.20 = 72,003.20 : x
  2. Step 2: Convert to fraction form
    81,744.80/122,455.20 = 72,003.20/x
  3. Step 3: Cross multiply
    81,744.80x = 122,455.20 × 72,003.20
  4. Step 4: Simplify right side
    81,744.80x = 8,817,166,256.64
  5. Step 5: Solve for x
    x = 8,817,166,256.64/81,744.80
  6. Step 6: Final answer
    x = 107,862.11

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