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Finding the Fourth Proportional to 138,651.36, 191,339.95 and 81,292.16

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Solution

The fourth proportional to 138,651.36, 191,339.95 and 81,292.16 is: 112,183.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,651.36 : 191,339.95 = 81,292.16 : x
  2. Step 2: Convert to fraction form
    138,651.36/191,339.95 = 81,292.16/x
  3. Step 3: Cross multiply
    138,651.36x = 191,339.95 × 81,292.16
  4. Step 4: Simplify right side
    138,651.36x = 15,554,436,952.41
  5. Step 5: Solve for x
    x = 15,554,436,952.41/138,651.36
  6. Step 6: Final answer
    x = 112,183.81

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