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Finding the Third Proportional to 61,219 and 129,788

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Solution

The third proportional to 61,219 and 129,788 is: 275,158.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,219 : 129,788 = 129,788 : x
  2. Step 2: Convert to fraction form
    61,219/129,788 = 129,788/x
  3. Step 3: Cross multiply
    61,219x = 129,788 × 129,788
  4. Step 4: Simplify right side
    61,219x = 16,844,924,944
  5. Step 5: Solve for x
    x = 16,844,924,944/61,219
  6. Step 6: Final answer
    x = 275,158.45

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.