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Finding the Fourth Proportional to 67.67, 101.55 and 43.64

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Solution

The fourth proportional to 67.67, 101.55 and 43.64 is: 65.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.67 : 101.55 = 43.64 : x
  2. Step 2: Convert to fraction form
    67.67/101.55 = 43.64/x
  3. Step 3: Cross multiply
    67.67x = 101.55 × 43.64
  4. Step 4: Simplify right side
    67.67x = 4,431.64
  5. Step 5: Solve for x
    x = 4,431.64/67.67
  6. Step 6: Final answer
    x = 65.49

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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.