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Finding the Fourth Proportional to 110.45, 165.56 and 71.96

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Solution

The fourth proportional to 110.45, 165.56 and 71.96 is: 107.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.45 : 165.56 = 71.96 : x
  2. Step 2: Convert to fraction form
    110.45/165.56 = 71.96/x
  3. Step 3: Cross multiply
    110.45x = 165.56 × 71.96
  4. Step 4: Simplify right side
    110.45x = 11,914.02
  5. Step 5: Solve for x
    x = 11,914.02/110.45
  6. Step 6: Final answer
    x = 107.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.