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Finding the Third Proportional to 30,212 and 66,402

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Solution

The third proportional to 30,212 and 66,402 is: 145,942.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,212 : 66,402 = 66,402 : x
  2. Step 2: Convert to fraction form
    30,212/66,402 = 66,402/x
  3. Step 3: Cross multiply
    30,212x = 66,402 × 66,402
  4. Step 4: Simplify right side
    30,212x = 4,409,225,604
  5. Step 5: Solve for x
    x = 4,409,225,604/30,212
  6. Step 6: Final answer
    x = 145,942.86

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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.