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Finding the Third Proportional to 57,722 and 86,585

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Solution

The third proportional to 57,722 and 86,585 is: 129,880.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,722 : 86,585 = 86,585 : x
  2. Step 2: Convert to fraction form
    57,722/86,585 = 86,585/x
  3. Step 3: Cross multiply
    57,722x = 86,585 × 86,585
  4. Step 4: Simplify right side
    57,722x = 7,496,962,225
  5. Step 5: Solve for x
    x = 7,496,962,225/57,722
  6. Step 6: Final answer
    x = 129,880.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.