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Finding the Fourth Proportional to 109.19, 164.04 and 65.97

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Solution

The fourth proportional to 109.19, 164.04 and 65.97 is: 99.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.19 : 164.04 = 65.97 : x
  2. Step 2: Convert to fraction form
    109.19/164.04 = 65.97/x
  3. Step 3: Cross multiply
    109.19x = 164.04 × 65.97
  4. Step 4: Simplify right side
    109.19x = 10,821.39
  5. Step 5: Solve for x
    x = 10,821.39/109.19
  6. Step 6: Final answer
    x = 99.11

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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.