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Finding the Fourth Proportional to 92.08, 137.85 and 72.69

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Solution

The fourth proportional to 92.08, 137.85 and 72.69 is: 108.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.08 : 137.85 = 72.69 : x
  2. Step 2: Convert to fraction form
    92.08/137.85 = 72.69/x
  3. Step 3: Cross multiply
    92.08x = 137.85 × 72.69
  4. Step 4: Simplify right side
    92.08x = 10,019.63
  5. Step 5: Solve for x
    x = 10,019.63/92.08
  6. Step 6: Final answer
    x = 108.81

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