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Finding the Third Proportional to 56,340 and 78,770

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Solution

The third proportional to 56,340 and 78,770 is: 110,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,340 : 78,770 = 78,770 : x
  2. Step 2: Convert to fraction form
    56,340/78,770 = 78,770/x
  3. Step 3: Cross multiply
    56,340x = 78,770 × 78,770
  4. Step 4: Simplify right side
    56,340x = 6,204,712,900
  5. Step 5: Solve for x
    x = 6,204,712,900/56,340
  6. Step 6: Final answer
    x = 110,129.80

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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.