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Finding the Third Proportional to 54,702 and 78,219

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Solution

The third proportional to 54,702 and 78,219 is: 111,846.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,702 : 78,219 = 78,219 : x
  2. Step 2: Convert to fraction form
    54,702/78,219 = 78,219/x
  3. Step 3: Cross multiply
    54,702x = 78,219 × 78,219
  4. Step 4: Simplify right side
    54,702x = 6,118,211,961
  5. Step 5: Solve for x
    x = 6,118,211,961/54,702
  6. Step 6: Final answer
    x = 111,846.22

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.