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Finding the Fourth Proportional to 178,987.45, 268,438.78 and 66,720.37

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Solution

The fourth proportional to 178,987.45, 268,438.78 and 66,720.37 is: 100,064.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,987.45 : 268,438.78 = 66,720.37 : x
  2. Step 2: Convert to fraction form
    178,987.45/268,438.78 = 66,720.37/x
  3. Step 3: Cross multiply
    178,987.45x = 268,438.78 × 66,720.37
  4. Step 4: Simplify right side
    178,987.45x = 17,910,334,723.95
  5. Step 5: Solve for x
    x = 17,910,334,723.95/178,987.45
  6. Step 6: Final answer
    x = 100,064.75

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