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Finding the Fourth Proportional to 115.59, 173.21 and 72.75

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Solution

The fourth proportional to 115.59, 173.21 and 72.75 is: 109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.59 : 173.21 = 72.75 : x
  2. Step 2: Convert to fraction form
    115.59/173.21 = 72.75/x
  3. Step 3: Cross multiply
    115.59x = 173.21 × 72.75
  4. Step 4: Simplify right side
    115.59x = 12,600.66
  5. Step 5: Solve for x
    x = 12,600.66/115.59
  6. Step 6: Final answer
    x = 109.01

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