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Finding the Fourth Proportional to 106.25, 159.07 and 67.64

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Solution

The fourth proportional to 106.25, 159.07 and 67.64 is: 101.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.25 : 159.07 = 67.64 : x
  2. Step 2: Convert to fraction form
    106.25/159.07 = 67.64/x
  3. Step 3: Cross multiply
    106.25x = 159.07 × 67.64
  4. Step 4: Simplify right side
    106.25x = 10,759.49
  5. Step 5: Solve for x
    x = 10,759.49/106.25
  6. Step 6: Final answer
    x = 101.27

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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.