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Finding the Third Proportional to 38,890.50 and 85,557

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Solution

The third proportional to 38,890.50 and 85,557 is: 188,220.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,890.50 : 85,557 = 85,557 : x
  2. Step 2: Convert to fraction form
    38,890.50/85,557 = 85,557/x
  3. Step 3: Cross multiply
    38,890.50x = 85,557 × 85,557
  4. Step 4: Simplify right side
    38,890.50x = 7,320,000,249
  5. Step 5: Solve for x
    x = 7,320,000,249/38,890.50
  6. Step 6: Final answer
    x = 188,220.78

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.