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Finding the Fourth Proportional to 139.92, 209.87 and 58.85

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Solution

The fourth proportional to 139.92, 209.87 and 58.85 is: 88.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.92 : 209.87 = 58.85 : x
  2. Step 2: Convert to fraction form
    139.92/209.87 = 58.85/x
  3. Step 3: Cross multiply
    139.92x = 209.87 × 58.85
  4. Step 4: Simplify right side
    139.92x = 12,350.85
  5. Step 5: Solve for x
    x = 12,350.85/139.92
  6. Step 6: Final answer
    x = 88.27

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