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Finding the Third Proportional to 38,930 and 85,130

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Solution

The third proportional to 38,930 and 85,130 is: 186,157.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,930 : 85,130 = 85,130 : x
  2. Step 2: Convert to fraction form
    38,930/85,130 = 85,130/x
  3. Step 3: Cross multiply
    38,930x = 85,130 × 85,130
  4. Step 4: Simplify right side
    38,930x = 7,247,116,900
  5. Step 5: Solve for x
    x = 7,247,116,900/38,930
  6. Step 6: Final answer
    x = 186,157.64

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.