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Finding the Third Proportional to 75.46 and 109.63

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Solution

The third proportional to 75.46 and 109.63 is: 159.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.46 : 109.63 = 109.63 : x
  2. Step 2: Convert to fraction form
    75.46/109.63 = 109.63/x
  3. Step 3: Cross multiply
    75.46x = 109.63 × 109.63
  4. Step 4: Simplify right side
    75.46x = 12,019.78
  5. Step 5: Solve for x
    x = 12,019.78/75.46
  6. Step 6: Final answer
    x = 159.28

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.