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Finding the Fourth Proportional to 67.57, 101.37 and 21.93

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Solution

The fourth proportional to 67.57, 101.37 and 21.93 is: 32.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.57 : 101.37 = 21.93 : x
  2. Step 2: Convert to fraction form
    67.57/101.37 = 21.93/x
  3. Step 3: Cross multiply
    67.57x = 101.37 × 21.93
  4. Step 4: Simplify right side
    67.57x = 2,222.62
  5. Step 5: Solve for x
    x = 2,222.62/67.57
  6. Step 6: Final answer
    x = 32.89

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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.