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Finding the Third Proportional to 64,215 and 85,230

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Solution

The third proportional to 64,215 and 85,230 is: 113,122.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,215 : 85,230 = 85,230 : x
  2. Step 2: Convert to fraction form
    64,215/85,230 = 85,230/x
  3. Step 3: Cross multiply
    64,215x = 85,230 × 85,230
  4. Step 4: Simplify right side
    64,215x = 7,264,152,900
  5. Step 5: Solve for x
    x = 7,264,152,900/64,215
  6. Step 6: Final answer
    x = 113,122.37

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.