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Finding the Fourth Proportional to 74.52, 111.75 and 51.71

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Solution

The fourth proportional to 74.52, 111.75 and 51.71 is: 77.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.52 : 111.75 = 51.71 : x
  2. Step 2: Convert to fraction form
    74.52/111.75 = 51.71/x
  3. Step 3: Cross multiply
    74.52x = 111.75 × 51.71
  4. Step 4: Simplify right side
    74.52x = 5,777.84
  5. Step 5: Solve for x
    x = 5,777.84/74.52
  6. Step 6: Final answer
    x = 77.53

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