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Finding the Fourth Proportional to 209.24, 313.97 and 87.59

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Solution

The fourth proportional to 209.24, 313.97 and 87.59 is: 131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.24 : 313.97 = 87.59 : x
  2. Step 2: Convert to fraction form
    209.24/313.97 = 87.59/x
  3. Step 3: Cross multiply
    209.24x = 313.97 × 87.59
  4. Step 4: Simplify right side
    209.24x = 27,500.63
  5. Step 5: Solve for x
    x = 27,500.63/209.24
  6. Step 6: Final answer
    x = 131.43

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