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Finding the Third Proportional to 84,564 and 131,688

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Solution

The third proportional to 84,564 and 131,688 is: 205,072.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,564 : 131,688 = 131,688 : x
  2. Step 2: Convert to fraction form
    84,564/131,688 = 131,688/x
  3. Step 3: Cross multiply
    84,564x = 131,688 × 131,688
  4. Step 4: Simplify right side
    84,564x = 17,341,729,344
  5. Step 5: Solve for x
    x = 17,341,729,344/84,564
  6. Step 6: Final answer
    x = 205,072.25

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.