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Finding the Fourth Proportional to 67.29, 100.89 and 43.26

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Solution

The fourth proportional to 67.29, 100.89 and 43.26 is: 64.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.29 : 100.89 = 43.26 : x
  2. Step 2: Convert to fraction form
    67.29/100.89 = 43.26/x
  3. Step 3: Cross multiply
    67.29x = 100.89 × 43.26
  4. Step 4: Simplify right side
    67.29x = 4,364.50
  5. Step 5: Solve for x
    x = 4,364.50/67.29
  6. Step 6: Final answer
    x = 64.86

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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.