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Finding the Third Proportional to 52.31 and 71.72

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Solution

The third proportional to 52.31 and 71.72 is: 98.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.31 : 71.72 = 71.72 : x
  2. Step 2: Convert to fraction form
    52.31/71.72 = 71.72/x
  3. Step 3: Cross multiply
    52.31x = 71.72 × 71.72
  4. Step 4: Simplify right side
    52.31x = 5,143.58
  5. Step 5: Solve for x
    x = 5,143.58/52.31
  6. Step 6: Final answer
    x = 98.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.