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Finding the Third Proportional to 72,419 and 155,457

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Solution

The third proportional to 72,419 and 155,457 is: 333,709.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,419 : 155,457 = 155,457 : x
  2. Step 2: Convert to fraction form
    72,419/155,457 = 155,457/x
  3. Step 3: Cross multiply
    72,419x = 155,457 × 155,457
  4. Step 4: Simplify right side
    72,419x = 24,166,878,849
  5. Step 5: Solve for x
    x = 24,166,878,849/72,419
  6. Step 6: Final answer
    x = 333,709.09

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.