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Finding the Third Proportional to 81,312 and 177,984

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Solution

The third proportional to 81,312 and 177,984 is: 389,589.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,312 : 177,984 = 177,984 : x
  2. Step 2: Convert to fraction form
    81,312/177,984 = 177,984/x
  3. Step 3: Cross multiply
    81,312x = 177,984 × 177,984
  4. Step 4: Simplify right side
    81,312x = 31,678,304,256
  5. Step 5: Solve for x
    x = 31,678,304,256/81,312
  6. Step 6: Final answer
    x = 389,589.53

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.