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Finding the Fourth Proportional to 110.26, 165.39 and 71.65

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Solution

The fourth proportional to 110.26, 165.39 and 71.65 is: 107.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.26 : 165.39 = 71.65 : x
  2. Step 2: Convert to fraction form
    110.26/165.39 = 71.65/x
  3. Step 3: Cross multiply
    110.26x = 165.39 × 71.65
  4. Step 4: Simplify right side
    110.26x = 11,849.37
  5. Step 5: Solve for x
    x = 11,849.37/110.26
  6. Step 6: Final answer
    x = 107.47

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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.