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Finding the Third Proportional to 78,787.13 and 172,881

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Solution

The third proportional to 78,787.13 and 172,881 is: 379,349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.13 : 172,881 = 172,881 : x
  2. Step 2: Convert to fraction form
    78,787.13/172,881 = 172,881/x
  3. Step 3: Cross multiply
    78,787.13x = 172,881 × 172,881
  4. Step 4: Simplify right side
    78,787.13x = 29,887,840,161
  5. Step 5: Solve for x
    x = 29,887,840,161/78,787.13
  6. Step 6: Final answer
    x = 379,349.29

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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.