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Finding the Third Proportional to 30,561 and 66,270

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Solution

The third proportional to 30,561 and 66,270 is: 143,703.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,561 : 66,270 = 66,270 : x
  2. Step 2: Convert to fraction form
    30,561/66,270 = 66,270/x
  3. Step 3: Cross multiply
    30,561x = 66,270 × 66,270
  4. Step 4: Simplify right side
    30,561x = 4,391,712,900
  5. Step 5: Solve for x
    x = 4,391,712,900/30,561
  6. Step 6: Final answer
    x = 143,703.18

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.