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Finding the Third Proportional to 80.63 and 89.63

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Solution

The third proportional to 80.63 and 89.63 is: 99.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.63 : 89.63 = 89.63 : x
  2. Step 2: Convert to fraction form
    80.63/89.63 = 89.63/x
  3. Step 3: Cross multiply
    80.63x = 89.63 × 89.63
  4. Step 4: Simplify right side
    80.63x = 8,032.64
  5. Step 5: Solve for x
    x = 8,032.64/80.63
  6. Step 6: Final answer
    x = 99.63

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.