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Finding the Third Proportional to 85,130 and 128,879

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Solution

The third proportional to 85,130 and 128,879 is: 195,110.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,130 : 128,879 = 128,879 : x
  2. Step 2: Convert to fraction form
    85,130/128,879 = 128,879/x
  3. Step 3: Cross multiply
    85,130x = 128,879 × 128,879
  4. Step 4: Simplify right side
    85,130x = 16,609,796,641
  5. Step 5: Solve for x
    x = 16,609,796,641/85,130
  6. Step 6: Final answer
    x = 195,110.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.