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Finding the Fourth Proportional to 80.02, 110.57 and 63.78

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Solution

The fourth proportional to 80.02, 110.57 and 63.78 is: 88.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.02 : 110.57 = 63.78 : x
  2. Step 2: Convert to fraction form
    80.02/110.57 = 63.78/x
  3. Step 3: Cross multiply
    80.02x = 110.57 × 63.78
  4. Step 4: Simplify right side
    80.02x = 7,052.15
  5. Step 5: Solve for x
    x = 7,052.15/80.02
  6. Step 6: Final answer
    x = 88.13

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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.