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Finding the Fourth Proportional to 209.81, 314.69 and 123.19

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Solution

The fourth proportional to 209.81, 314.69 and 123.19 is: 184.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.81 : 314.69 = 123.19 : x
  2. Step 2: Convert to fraction form
    209.81/314.69 = 123.19/x
  3. Step 3: Cross multiply
    209.81x = 314.69 × 123.19
  4. Step 4: Simplify right side
    209.81x = 38,765.26
  5. Step 5: Solve for x
    x = 38,765.26/209.81
  6. Step 6: Final answer
    x = 184.77

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