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Finding the Fourth Proportional to 67.43, 100.98 and 66.98

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Solution

The fourth proportional to 67.43, 100.98 and 66.98 is: 100.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.43 : 100.98 = 66.98 : x
  2. Step 2: Convert to fraction form
    67.43/100.98 = 66.98/x
  3. Step 3: Cross multiply
    67.43x = 100.98 × 66.98
  4. Step 4: Simplify right side
    67.43x = 6,763.14
  5. Step 5: Solve for x
    x = 6,763.14/67.43
  6. Step 6: Final answer
    x = 100.31

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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.