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Finding the Fourth Proportional to 107.92, 161.88 and 65.44

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Solution

The fourth proportional to 107.92, 161.88 and 65.44 is: 98.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.92 : 161.88 = 65.44 : x
  2. Step 2: Convert to fraction form
    107.92/161.88 = 65.44/x
  3. Step 3: Cross multiply
    107.92x = 161.88 × 65.44
  4. Step 4: Simplify right side
    107.92x = 10,593.43
  5. Step 5: Solve for x
    x = 10,593.43/107.92
  6. Step 6: Final answer
    x = 98.16

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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.