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Finding the Fourth Proportional to 115.55, 173.05 and 60.61

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Solution

The fourth proportional to 115.55, 173.05 and 60.61 is: 90.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.55 : 173.05 = 60.61 : x
  2. Step 2: Convert to fraction form
    115.55/173.05 = 60.61/x
  3. Step 3: Cross multiply
    115.55x = 173.05 × 60.61
  4. Step 4: Simplify right side
    115.55x = 10,487.98
  5. Step 5: Solve for x
    x = 10,487.98/115.55
  6. Step 6: Final answer
    x = 90.76

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