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Finding the Third Proportional to 45,487 and 66,930

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Solution

The third proportional to 45,487 and 66,930 is: 98,481.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,487 : 66,930 = 66,930 : x
  2. Step 2: Convert to fraction form
    45,487/66,930 = 66,930/x
  3. Step 3: Cross multiply
    45,487x = 66,930 × 66,930
  4. Step 4: Simplify right side
    45,487x = 4,479,624,900
  5. Step 5: Solve for x
    x = 4,479,624,900/45,487
  6. Step 6: Final answer
    x = 98,481.43

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.