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Finding the Third Proportional to 115,280 and 172,188

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Solution

The third proportional to 115,280 and 172,188 is: 257,188.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,280 : 172,188 = 172,188 : x
  2. Step 2: Convert to fraction form
    115,280/172,188 = 172,188/x
  3. Step 3: Cross multiply
    115,280x = 172,188 × 172,188
  4. Step 4: Simplify right side
    115,280x = 29,648,707,344
  5. Step 5: Solve for x
    x = 29,648,707,344/115,280
  6. Step 6: Final answer
    x = 257,188.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.