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Finding the Third Proportional to 85,904 and 128,454

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Solution

The third proportional to 85,904 and 128,454 is: 192,079.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,904 : 128,454 = 128,454 : x
  2. Step 2: Convert to fraction form
    85,904/128,454 = 128,454/x
  3. Step 3: Cross multiply
    85,904x = 128,454 × 128,454
  4. Step 4: Simplify right side
    85,904x = 16,500,430,116
  5. Step 5: Solve for x
    x = 16,500,430,116/85,904
  6. Step 6: Final answer
    x = 192,079.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.