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Finding the Fourth Proportional to 161.98, 223.55 and 106.75

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Solution

The fourth proportional to 161.98, 223.55 and 106.75 is: 147.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.98 : 223.55 = 106.75 : x
  2. Step 2: Convert to fraction form
    161.98/223.55 = 106.75/x
  3. Step 3: Cross multiply
    161.98x = 223.55 × 106.75
  4. Step 4: Simplify right side
    161.98x = 23,863.96
  5. Step 5: Solve for x
    x = 23,863.96/161.98
  6. Step 6: Final answer
    x = 147.33

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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.