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Finding the Third Proportional to 72,316 and 155,728

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Solution

The third proportional to 72,316 and 155,728 is: 335,350.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,316 : 155,728 = 155,728 : x
  2. Step 2: Convert to fraction form
    72,316/155,728 = 155,728/x
  3. Step 3: Cross multiply
    72,316x = 155,728 × 155,728
  4. Step 4: Simplify right side
    72,316x = 24,251,209,984
  5. Step 5: Solve for x
    x = 24,251,209,984/72,316
  6. Step 6: Final answer
    x = 335,350.54

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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.