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Finding the Third Proportional to 66,118 and 145,361

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Solution

The third proportional to 66,118 and 145,361 is: 319,577.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,118 : 145,361 = 145,361 : x
  2. Step 2: Convert to fraction form
    66,118/145,361 = 145,361/x
  3. Step 3: Cross multiply
    66,118x = 145,361 × 145,361
  4. Step 4: Simplify right side
    66,118x = 21,129,820,321
  5. Step 5: Solve for x
    x = 21,129,820,321/66,118
  6. Step 6: Final answer
    x = 319,577.43

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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.