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Finding the Fourth Proportional to 105.04, 157.38 and 72.88

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Solution

The fourth proportional to 105.04, 157.38 and 72.88 is: 109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.04 : 157.38 = 72.88 : x
  2. Step 2: Convert to fraction form
    105.04/157.38 = 72.88/x
  3. Step 3: Cross multiply
    105.04x = 157.38 × 72.88
  4. Step 4: Simplify right side
    105.04x = 11,469.85
  5. Step 5: Solve for x
    x = 11,469.85/105.04
  6. Step 6: Final answer
    x = 109.20

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