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Finding the Third Proportional to 38,979 and 84,789

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Solution

The third proportional to 38,979 and 84,789 is: 184,437.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,979 : 84,789 = 84,789 : x
  2. Step 2: Convert to fraction form
    38,979/84,789 = 84,789/x
  3. Step 3: Cross multiply
    38,979x = 84,789 × 84,789
  4. Step 4: Simplify right side
    38,979x = 7,189,174,521
  5. Step 5: Solve for x
    x = 7,189,174,521/38,979
  6. Step 6: Final answer
    x = 184,437.12

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.