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Finding the Third Proportional to 31.50 and 57.13

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Solution

The third proportional to 31.50 and 57.13 is: 103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.50 : 57.13 = 57.13 : x
  2. Step 2: Convert to fraction form
    31.50/57.13 = 57.13/x
  3. Step 3: Cross multiply
    31.50x = 57.13 × 57.13
  4. Step 4: Simplify right side
    31.50x = 3,263.27
  5. Step 5: Solve for x
    x = 3,263.27/31.50
  6. Step 6: Final answer
    x = 103.60

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.