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Finding the Third Proportional to 64,521 and 138,930.75

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Solution

The third proportional to 64,521 and 138,930.75 is: 299,154.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,521 : 138,930.75 = 138,930.75 : x
  2. Step 2: Convert to fraction form
    64,521/138,930.75 = 138,930.75/x
  3. Step 3: Cross multiply
    64,521x = 138,930.75 × 138,930.75
  4. Step 4: Simplify right side
    64,521x = 19,301,753,295.56
  5. Step 5: Solve for x
    x = 19,301,753,295.56/64,521
  6. Step 6: Final answer
    x = 299,154.59

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.