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Finding the Fourth Proportional to 109.40, 164.09 and 107.37

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Solution

The fourth proportional to 109.40, 164.09 and 107.37 is: 161.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.40 : 164.09 = 107.37 : x
  2. Step 2: Convert to fraction form
    109.40/164.09 = 107.37/x
  3. Step 3: Cross multiply
    109.40x = 164.09 × 107.37
  4. Step 4: Simplify right side
    109.40x = 17,618.61
  5. Step 5: Solve for x
    x = 17,618.61/109.40
  6. Step 6: Final answer
    x = 161.06

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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.