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Finding the Third Proportional to 115,511 and 172,786

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Solution

The third proportional to 115,511 and 172,786 is: 258,460.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,511 : 172,786 = 172,786 : x
  2. Step 2: Convert to fraction form
    115,511/172,786 = 172,786/x
  3. Step 3: Cross multiply
    115,511x = 172,786 × 172,786
  4. Step 4: Simplify right side
    115,511x = 29,855,001,796
  5. Step 5: Solve for x
    x = 29,855,001,796/115,511
  6. Step 6: Final answer
    x = 258,460.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.