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Finding the Fourth Proportional to 81,561.32, 122,259.32 and 55,268.72

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Solution

The fourth proportional to 81,561.32, 122,259.32 and 55,268.72 is: 82,847.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,561.32 : 122,259.32 = 55,268.72 : x
  2. Step 2: Convert to fraction form
    81,561.32/122,259.32 = 55,268.72/x
  3. Step 3: Cross multiply
    81,561.32x = 122,259.32 × 55,268.72
  4. Step 4: Simplify right side
    81,561.32x = 6,757,116,124.47
  5. Step 5: Solve for x
    x = 6,757,116,124.47/81,561.32
  6. Step 6: Final answer
    x = 82,847.07

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