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Finding the Third Proportional to 53,424 and 82,720

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Solution

The third proportional to 53,424 and 82,720 is: 128,080.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,424 : 82,720 = 82,720 : x
  2. Step 2: Convert to fraction form
    53,424/82,720 = 82,720/x
  3. Step 3: Cross multiply
    53,424x = 82,720 × 82,720
  4. Step 4: Simplify right side
    53,424x = 6,842,598,400
  5. Step 5: Solve for x
    x = 6,842,598,400/53,424
  6. Step 6: Final answer
    x = 128,080.98

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.