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Finding the Third Proportional to 42,998 and 66,442

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Solution

The third proportional to 42,998 and 66,442 is: 102,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,998 : 66,442 = 66,442 : x
  2. Step 2: Convert to fraction form
    42,998/66,442 = 66,442/x
  3. Step 3: Cross multiply
    42,998x = 66,442 × 66,442
  4. Step 4: Simplify right side
    42,998x = 4,414,539,364
  5. Step 5: Solve for x
    x = 4,414,539,364/42,998
  6. Step 6: Final answer
    x = 102,668.48

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.