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Finding the Third Proportional to 86,313 and 129,109

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Solution

The third proportional to 86,313 and 129,109 is: 193,124.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,313 : 129,109 = 129,109 : x
  2. Step 2: Convert to fraction form
    86,313/129,109 = 129,109/x
  3. Step 3: Cross multiply
    86,313x = 129,109 × 129,109
  4. Step 4: Simplify right side
    86,313x = 16,669,133,881
  5. Step 5: Solve for x
    x = 16,669,133,881/86,313
  6. Step 6: Final answer
    x = 193,124.26

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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.