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Finding the Third Proportional to 135,009 and 278,658

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Solution

The third proportional to 135,009 and 278,658 is: 575,148.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,009 : 278,658 = 278,658 : x
  2. Step 2: Convert to fraction form
    135,009/278,658 = 278,658/x
  3. Step 3: Cross multiply
    135,009x = 278,658 × 278,658
  4. Step 4: Simplify right side
    135,009x = 77,650,280,964
  5. Step 5: Solve for x
    x = 77,650,280,964/135,009
  6. Step 6: Final answer
    x = 575,148.92

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.