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Finding the Third Proportional to 140,130 and 217,080

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Solution

The third proportional to 140,130 and 217,080 is: 336,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,130 : 217,080 = 217,080 : x
  2. Step 2: Convert to fraction form
    140,130/217,080 = 217,080/x
  3. Step 3: Cross multiply
    140,130x = 217,080 × 217,080
  4. Step 4: Simplify right side
    140,130x = 47,123,726,400
  5. Step 5: Solve for x
    x = 47,123,726,400/140,130
  6. Step 6: Final answer
    x = 336,285.78

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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.