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Finding the Third Proportional to 56,718 and 79,290

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Solution

The third proportional to 56,718 and 79,290 is: 110,844.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,718 : 79,290 = 79,290 : x
  2. Step 2: Convert to fraction form
    56,718/79,290 = 79,290/x
  3. Step 3: Cross multiply
    56,718x = 79,290 × 79,290
  4. Step 4: Simplify right side
    56,718x = 6,286,904,100
  5. Step 5: Solve for x
    x = 6,286,904,100/56,718
  6. Step 6: Final answer
    x = 110,844.95

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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.