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Finding the Third Proportional to 56,864 and 79,540

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Solution

The third proportional to 56,864 and 79,540 is: 111,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,864 : 79,540 = 79,540 : x
  2. Step 2: Convert to fraction form
    56,864/79,540 = 79,540/x
  3. Step 3: Cross multiply
    56,864x = 79,540 × 79,540
  4. Step 4: Simplify right side
    56,864x = 6,326,611,600
  5. Step 5: Solve for x
    x = 6,326,611,600/56,864
  6. Step 6: Final answer
    x = 111,258.65

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.