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Finding the Third Proportional to 30,520 and 66,200

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Solution

The third proportional to 30,520 and 66,200 is: 143,592.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,520 : 66,200 = 66,200 : x
  2. Step 2: Convert to fraction form
    30,520/66,200 = 66,200/x
  3. Step 3: Cross multiply
    30,520x = 66,200 × 66,200
  4. Step 4: Simplify right side
    30,520x = 4,382,440,000
  5. Step 5: Solve for x
    x = 4,382,440,000/30,520
  6. Step 6: Final answer
    x = 143,592.40

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.