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Finding the Third Proportional to 74,070 and 109,161

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Solution

The third proportional to 74,070 and 109,161 is: 160,876.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,070 : 109,161 = 109,161 : x
  2. Step 2: Convert to fraction form
    74,070/109,161 = 109,161/x
  3. Step 3: Cross multiply
    74,070x = 109,161 × 109,161
  4. Step 4: Simplify right side
    74,070x = 11,916,123,921
  5. Step 5: Solve for x
    x = 11,916,123,921/74,070
  6. Step 6: Final answer
    x = 160,876.52

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.