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Finding the Fourth Proportional to 139.91, 209.90 and 48.62

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Solution

The fourth proportional to 139.91, 209.90 and 48.62 is: 72.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.91 : 209.90 = 48.62 : x
  2. Step 2: Convert to fraction form
    139.91/209.90 = 48.62/x
  3. Step 3: Cross multiply
    139.91x = 209.90 × 48.62
  4. Step 4: Simplify right side
    139.91x = 10,204.05
  5. Step 5: Solve for x
    x = 10,204.05/139.91
  6. Step 6: Final answer
    x = 72.94

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