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Finding the Fourth Proportional to 123,375.20, 170,258.95 and 72,388.80

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Solution

The fourth proportional to 123,375.20, 170,258.95 and 72,388.80 is: 99,897.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,375.20 : 170,258.95 = 72,388.80 : x
  2. Step 2: Convert to fraction form
    123,375.20/170,258.95 = 72,388.80/x
  3. Step 3: Cross multiply
    123,375.20x = 170,258.95 × 72,388.80
  4. Step 4: Simplify right side
    123,375.20x = 12,324,840,805.77
  5. Step 5: Solve for x
    x = 12,324,840,805.77/123,375.20
  6. Step 6: Final answer
    x = 99,897.23

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