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Finding the Fourth Proportional to 109.50, 163.16 and 103.56

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Solution

The fourth proportional to 109.50, 163.16 and 103.56 is: 154.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.50 : 163.16 = 103.56 : x
  2. Step 2: Convert to fraction form
    109.50/163.16 = 103.56/x
  3. Step 3: Cross multiply
    109.50x = 163.16 × 103.56
  4. Step 4: Simplify right side
    109.50x = 16,896.33
  5. Step 5: Solve for x
    x = 16,896.33/109.50
  6. Step 6: Final answer
    x = 154.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.