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Finding the Third Proportional to 82,420 and 176,502

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Solution

The third proportional to 82,420 and 176,502 is: 377,978.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,420 : 176,502 = 176,502 : x
  2. Step 2: Convert to fraction form
    82,420/176,502 = 176,502/x
  3. Step 3: Cross multiply
    82,420x = 176,502 × 176,502
  4. Step 4: Simplify right side
    82,420x = 31,152,956,004
  5. Step 5: Solve for x
    x = 31,152,956,004/82,420
  6. Step 6: Final answer
    x = 377,978.11

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.