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Finding the Third Proportional to 66,099 and 145,320

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Solution

The third proportional to 66,099 and 145,320 is: 319,488.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,099 : 145,320 = 145,320 : x
  2. Step 2: Convert to fraction form
    66,099/145,320 = 145,320/x
  3. Step 3: Cross multiply
    66,099x = 145,320 × 145,320
  4. Step 4: Simplify right side
    66,099x = 21,117,902,400
  5. Step 5: Solve for x
    x = 21,117,902,400/66,099
  6. Step 6: Final answer
    x = 319,488.98

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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.