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Finding the Third Proportional to 54,510 and 79,970

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Solution

The third proportional to 54,510 and 79,970 is: 117,321.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,510 : 79,970 = 79,970 : x
  2. Step 2: Convert to fraction form
    54,510/79,970 = 79,970/x
  3. Step 3: Cross multiply
    54,510x = 79,970 × 79,970
  4. Step 4: Simplify right side
    54,510x = 6,395,200,900
  5. Step 5: Solve for x
    x = 6,395,200,900/54,510
  6. Step 6: Final answer
    x = 117,321.61

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.