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Finding the Fourth Proportional to 165.90, 248.66 and 108.22

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Solution

The fourth proportional to 165.90, 248.66 and 108.22 is: 162.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.90 : 248.66 = 108.22 : x
  2. Step 2: Convert to fraction form
    165.90/248.66 = 108.22/x
  3. Step 3: Cross multiply
    165.90x = 248.66 × 108.22
  4. Step 4: Simplify right side
    165.90x = 26,909.99
  5. Step 5: Solve for x
    x = 26,909.99/165.90
  6. Step 6: Final answer
    x = 162.21

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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.