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Finding the Third Proportional to 31,207 and 66,788

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Solution

The third proportional to 31,207 and 66,788 is: 142,937.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,207 : 66,788 = 66,788 : x
  2. Step 2: Convert to fraction form
    31,207/66,788 = 66,788/x
  3. Step 3: Cross multiply
    31,207x = 66,788 × 66,788
  4. Step 4: Simplify right side
    31,207x = 4,460,636,944
  5. Step 5: Solve for x
    x = 4,460,636,944/31,207
  6. Step 6: Final answer
    x = 142,937.06

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.