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Finding the Third Proportional to 55,684 and 86,355

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Solution

The third proportional to 55,684 and 86,355 is: 133,919.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,684 : 86,355 = 86,355 : x
  2. Step 2: Convert to fraction form
    55,684/86,355 = 86,355/x
  3. Step 3: Cross multiply
    55,684x = 86,355 × 86,355
  4. Step 4: Simplify right side
    55,684x = 7,457,186,025
  5. Step 5: Solve for x
    x = 7,457,186,025/55,684
  6. Step 6: Final answer
    x = 133,919.73

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.