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Finding the Third Proportional to 30,148 and 66,311

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Solution

The third proportional to 30,148 and 66,311 is: 145,852.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,148 : 66,311 = 66,311 : x
  2. Step 2: Convert to fraction form
    30,148/66,311 = 66,311/x
  3. Step 3: Cross multiply
    30,148x = 66,311 × 66,311
  4. Step 4: Simplify right side
    30,148x = 4,397,148,721
  5. Step 5: Solve for x
    x = 4,397,148,721/30,148
  6. Step 6: Final answer
    x = 145,852.09

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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.