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Finding the Fourth Proportional to 123.73, 185.73 and 72.43

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Solution

The fourth proportional to 123.73, 185.73 and 72.43 is: 108.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.73 : 185.73 = 72.43 : x
  2. Step 2: Convert to fraction form
    123.73/185.73 = 72.43/x
  3. Step 3: Cross multiply
    123.73x = 185.73 × 72.43
  4. Step 4: Simplify right side
    123.73x = 13,452.42
  5. Step 5: Solve for x
    x = 13,452.42/123.73
  6. Step 6: Final answer
    x = 108.72

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