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Finding the Third Proportional to 28,260 and 61,380

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Solution

The third proportional to 28,260 and 61,380 is: 133,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,260 : 61,380 = 61,380 : x
  2. Step 2: Convert to fraction form
    28,260/61,380 = 61,380/x
  3. Step 3: Cross multiply
    28,260x = 61,380 × 61,380
  4. Step 4: Simplify right side
    28,260x = 3,767,504,400
  5. Step 5: Solve for x
    x = 3,767,504,400/28,260
  6. Step 6: Final answer
    x = 133,315.80

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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.