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Finding the Third Proportional to 77,940 and 170,442

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Solution

The third proportional to 77,940 and 170,442 is: 372,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940 : 170,442 = 170,442 : x
  2. Step 2: Convert to fraction form
    77,940/170,442 = 170,442/x
  3. Step 3: Cross multiply
    77,940x = 170,442 × 170,442
  4. Step 4: Simplify right side
    77,940x = 29,050,475,364
  5. Step 5: Solve for x
    x = 29,050,475,364/77,940
  6. Step 6: Final answer
    x = 372,728.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.