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Finding the Fourth Proportional to 96.50, 133.15 and 63.80

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Solution

The fourth proportional to 96.50, 133.15 and 63.80 is: 88.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.50 : 133.15 = 63.80 : x
  2. Step 2: Convert to fraction form
    96.50/133.15 = 63.80/x
  3. Step 3: Cross multiply
    96.50x = 133.15 × 63.80
  4. Step 4: Simplify right side
    96.50x = 8,494.14
  5. Step 5: Solve for x
    x = 8,494.14/96.50
  6. Step 6: Final answer
    x = 88.03

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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.