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Finding the Third Proportional to 78,216 and 166,128

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Solution

The third proportional to 78,216 and 166,128 is: 352,849.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,216 : 166,128 = 166,128 : x
  2. Step 2: Convert to fraction form
    78,216/166,128 = 166,128/x
  3. Step 3: Cross multiply
    78,216x = 166,128 × 166,128
  4. Step 4: Simplify right side
    78,216x = 27,598,512,384
  5. Step 5: Solve for x
    x = 27,598,512,384/78,216
  6. Step 6: Final answer
    x = 352,849.96

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.