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Finding the Fourth Proportional to 128,990.60, 193,560.64 and 54,104.08

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Solution

The fourth proportional to 128,990.60, 193,560.64 and 54,104.08 is: 81,187.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,990.60 : 193,560.64 = 54,104.08 : x
  2. Step 2: Convert to fraction form
    128,990.60/193,560.64 = 54,104.08/x
  3. Step 3: Cross multiply
    128,990.60x = 193,560.64 × 54,104.08
  4. Step 4: Simplify right side
    128,990.60x = 10,472,420,351.41
  5. Step 5: Solve for x
    x = 10,472,420,351.41/128,990.60
  6. Step 6: Final answer
    x = 81,187.47

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