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Finding the Third Proportional to 39,790 and 85,806

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Solution

The third proportional to 39,790 and 85,806 is: 185,038.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,790 : 85,806 = 85,806 : x
  2. Step 2: Convert to fraction form
    39,790/85,806 = 85,806/x
  3. Step 3: Cross multiply
    39,790x = 85,806 × 85,806
  4. Step 4: Simplify right side
    39,790x = 7,362,669,636
  5. Step 5: Solve for x
    x = 7,362,669,636/39,790
  6. Step 6: Final answer
    x = 185,038.19

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.