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Finding the Third Proportional to 172,817 and 247,129.50

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Solution

The third proportional to 172,817 and 247,129.50 is: 353,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,817 : 247,129.50 = 247,129.50 : x
  2. Step 2: Convert to fraction form
    172,817/247,129.50 = 247,129.50/x
  3. Step 3: Cross multiply
    172,817x = 247,129.50 × 247,129.50
  4. Step 4: Simplify right side
    172,817x = 61,072,989,770.25
  5. Step 5: Solve for x
    x = 61,072,989,770.25/172,817
  6. Step 6: Final answer
    x = 353,396.89

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.