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Finding the Third Proportional to 78,720 and 166,332

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Solution

The third proportional to 78,720 and 166,332 is: 351,452.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720 : 166,332 = 166,332 : x
  2. Step 2: Convert to fraction form
    78,720/166,332 = 166,332/x
  3. Step 3: Cross multiply
    78,720x = 166,332 × 166,332
  4. Step 4: Simplify right side
    78,720x = 27,666,334,224
  5. Step 5: Solve for x
    x = 27,666,334,224/78,720
  6. Step 6: Final answer
    x = 351,452.42

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.