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Finding the Third Proportional to 31,248 and 67,491

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Solution

The third proportional to 31,248 and 67,491 is: 145,770.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,248 : 67,491 = 67,491 : x
  2. Step 2: Convert to fraction form
    31,248/67,491 = 67,491/x
  3. Step 3: Cross multiply
    31,248x = 67,491 × 67,491
  4. Step 4: Simplify right side
    31,248x = 4,555,035,081
  5. Step 5: Solve for x
    x = 4,555,035,081/31,248
  6. Step 6: Final answer
    x = 145,770.45

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.