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Finding the Third Proportional to 31,072 and 67,660

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Solution

The third proportional to 31,072 and 67,660 is: 147,331.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072 : 67,660 = 67,660 : x
  2. Step 2: Convert to fraction form
    31,072/67,660 = 67,660/x
  3. Step 3: Cross multiply
    31,072x = 67,660 × 67,660
  4. Step 4: Simplify right side
    31,072x = 4,577,875,600
  5. Step 5: Solve for x
    x = 4,577,875,600/31,072
  6. Step 6: Final answer
    x = 147,331.22

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.