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Finding the Third Proportional to 102,780 and 159,057

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Solution

The third proportional to 102,780 and 159,057 is: 246,148.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,780 : 159,057 = 159,057 : x
  2. Step 2: Convert to fraction form
    102,780/159,057 = 159,057/x
  3. Step 3: Cross multiply
    102,780x = 159,057 × 159,057
  4. Step 4: Simplify right side
    102,780x = 25,299,129,249
  5. Step 5: Solve for x
    x = 25,299,129,249/102,780
  6. Step 6: Final answer
    x = 246,148.37

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.