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Finding the Fourth Proportional to 84.41, 126.35 and 63.98

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Solution

The fourth proportional to 84.41, 126.35 and 63.98 is: 95.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.41 : 126.35 = 63.98 : x
  2. Step 2: Convert to fraction form
    84.41/126.35 = 63.98/x
  3. Step 3: Cross multiply
    84.41x = 126.35 × 63.98
  4. Step 4: Simplify right side
    84.41x = 8,083.55
  5. Step 5: Solve for x
    x = 8,083.55/84.41
  6. Step 6: Final answer
    x = 95.77

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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.