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Finding the Fourth Proportional to 109.84, 165.46 and 109.30

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Solution

The fourth proportional to 109.84, 165.46 and 109.30 is: 164.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.84 : 165.46 = 109.30 : x
  2. Step 2: Convert to fraction form
    109.84/165.46 = 109.30/x
  3. Step 3: Cross multiply
    109.84x = 165.46 × 109.30
  4. Step 4: Simplify right side
    109.84x = 18,084.78
  5. Step 5: Solve for x
    x = 18,084.78/109.84
  6. Step 6: Final answer
    x = 164.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.