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Finding the Fourth Proportional to 123,873.58, 170,972.70 and 81,436.06

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Solution

The fourth proportional to 123,873.58, 170,972.70 and 81,436.06 is: 112,399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,873.58 : 170,972.70 = 81,436.06 : x
  2. Step 2: Convert to fraction form
    123,873.58/170,972.70 = 81,436.06/x
  3. Step 3: Cross multiply
    123,873.58x = 170,972.70 × 81,436.06
  4. Step 4: Simplify right side
    123,873.58x = 13,923,343,055.56
  5. Step 5: Solve for x
    x = 13,923,343,055.56/123,873.58
  6. Step 6: Final answer
    x = 112,399.62

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