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Finding the Fourth Proportional to 160.85, 221.81 and 108.33

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Solution

The fourth proportional to 160.85, 221.81 and 108.33 is: 149.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.85 : 221.81 = 108.33 : x
  2. Step 2: Convert to fraction form
    160.85/221.81 = 108.33/x
  3. Step 3: Cross multiply
    160.85x = 221.81 × 108.33
  4. Step 4: Simplify right side
    160.85x = 24,028.14
  5. Step 5: Solve for x
    x = 24,028.14/160.85
  6. Step 6: Final answer
    x = 149.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.