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Finding the Third Proportional to 39,090 and 84,258

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Solution

The third proportional to 39,090 and 84,258 is: 181,617.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,090 : 84,258 = 84,258 : x
  2. Step 2: Convert to fraction form
    39,090/84,258 = 84,258/x
  3. Step 3: Cross multiply
    39,090x = 84,258 × 84,258
  4. Step 4: Simplify right side
    39,090x = 7,099,410,564
  5. Step 5: Solve for x
    x = 7,099,410,564/39,090
  6. Step 6: Final answer
    x = 181,617.05

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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.