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Finding the Third Proportional to 128,040 and 169,906

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Solution

The third proportional to 128,040 and 169,906 is: 225,461.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040 : 169,906 = 169,906 : x
  2. Step 2: Convert to fraction form
    128,040/169,906 = 169,906/x
  3. Step 3: Cross multiply
    128,040x = 169,906 × 169,906
  4. Step 4: Simplify right side
    128,040x = 28,868,048,836
  5. Step 5: Solve for x
    x = 28,868,048,836/128,040
  6. Step 6: Final answer
    x = 225,461.17

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.