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Finding the Third Proportional to 57,680 and 84,288

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Solution

The third proportional to 57,680 and 84,288 is: 123,170.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,680 : 84,288 = 84,288 : x
  2. Step 2: Convert to fraction form
    57,680/84,288 = 84,288/x
  3. Step 3: Cross multiply
    57,680x = 84,288 × 84,288
  4. Step 4: Simplify right side
    57,680x = 7,104,466,944
  5. Step 5: Solve for x
    x = 7,104,466,944/57,680
  6. Step 6: Final answer
    x = 123,170.37

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.