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Finding the Fourth Proportional to 123.88, 185.62 and 75.69

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Solution

The fourth proportional to 123.88, 185.62 and 75.69 is: 113.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.88 : 185.62 = 75.69 : x
  2. Step 2: Convert to fraction form
    123.88/185.62 = 75.69/x
  3. Step 3: Cross multiply
    123.88x = 185.62 × 75.69
  4. Step 4: Simplify right side
    123.88x = 14,049.58
  5. Step 5: Solve for x
    x = 14,049.58/123.88
  6. Step 6: Final answer
    x = 113.41

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