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Finding the Third Proportional to 86,319 and 178,632

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Solution

The third proportional to 86,319 and 178,632 is: 369,668.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,319 : 178,632 = 178,632 : x
  2. Step 2: Convert to fraction form
    86,319/178,632 = 178,632/x
  3. Step 3: Cross multiply
    86,319x = 178,632 × 178,632
  4. Step 4: Simplify right side
    86,319x = 31,909,391,424
  5. Step 5: Solve for x
    x = 31,909,391,424/86,319
  6. Step 6: Final answer
    x = 369,668.22

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.