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Finding the Fourth Proportional to 67.57, 93.34 and 61.43

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Solution

The fourth proportional to 67.57, 93.34 and 61.43 is: 84.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.57 : 93.34 = 61.43 : x
  2. Step 2: Convert to fraction form
    67.57/93.34 = 61.43/x
  3. Step 3: Cross multiply
    67.57x = 93.34 × 61.43
  4. Step 4: Simplify right side
    67.57x = 5,733.88
  5. Step 5: Solve for x
    x = 5,733.88/67.57
  6. Step 6: Final answer
    x = 84.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.