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Finding the Third Proportional to 65,721 and 100,207.50

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Solution

The third proportional to 65,721 and 100,207.50 is: 152,790.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721 : 100,207.50 = 100,207.50 : x
  2. Step 2: Convert to fraction form
    65,721/100,207.50 = 100,207.50/x
  3. Step 3: Cross multiply
    65,721x = 100,207.50 × 100,207.50
  4. Step 4: Simplify right side
    65,721x = 10,041,543,056.25
  5. Step 5: Solve for x
    x = 10,041,543,056.25/65,721
  6. Step 6: Final answer
    x = 152,790.48

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.