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Finding the Fourth Proportional to 84.43, 116.38 and 63.70

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Solution

The fourth proportional to 84.43, 116.38 and 63.70 is: 87.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.43 : 116.38 = 63.70 : x
  2. Step 2: Convert to fraction form
    84.43/116.38 = 63.70/x
  3. Step 3: Cross multiply
    84.43x = 116.38 × 63.70
  4. Step 4: Simplify right side
    84.43x = 7,413.41
  5. Step 5: Solve for x
    x = 7,413.41/84.43
  6. Step 6: Final answer
    x = 87.81

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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.