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Finding the Third Proportional to 28,309 and 61,531

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Solution

The third proportional to 28,309 and 61,531 is: 133,740.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309 : 61,531 = 61,531 : x
  2. Step 2: Convert to fraction form
    28,309/61,531 = 61,531/x
  3. Step 3: Cross multiply
    28,309x = 61,531 × 61,531
  4. Step 4: Simplify right side
    28,309x = 3,786,063,961
  5. Step 5: Solve for x
    x = 3,786,063,961/28,309
  6. Step 6: Final answer
    x = 133,740.65

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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.