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Finding the Third Proportional to 61,281 and 128,745

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Solution

The third proportional to 61,281 and 128,745 is: 270,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,281 : 128,745 = 128,745 : x
  2. Step 2: Convert to fraction form
    61,281/128,745 = 128,745/x
  3. Step 3: Cross multiply
    61,281x = 128,745 × 128,745
  4. Step 4: Simplify right side
    61,281x = 16,575,275,025
  5. Step 5: Solve for x
    x = 16,575,275,025/61,281
  6. Step 6: Final answer
    x = 270,479.84

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.