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Finding the Third Proportional to 172,102.50 and 378,238.50

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Solution

The third proportional to 172,102.50 and 378,238.50 is: 831,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,102.50 : 378,238.50 = 378,238.50 : x
  2. Step 2: Convert to fraction form
    172,102.50/378,238.50 = 378,238.50/x
  3. Step 3: Cross multiply
    172,102.50x = 378,238.50 × 378,238.50
  4. Step 4: Simplify right side
    172,102.50x = 143,064,362,882.25
  5. Step 5: Solve for x
    x = 143,064,362,882.25/172,102.50
  6. Step 6: Final answer
    x = 831,274.17

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.