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Finding the Third Proportional to 59,985 and 129,906

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Solution

The third proportional to 59,985 and 129,906 is: 281,329.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,985 : 129,906 = 129,906 : x
  2. Step 2: Convert to fraction form
    59,985/129,906 = 129,906/x
  3. Step 3: Cross multiply
    59,985x = 129,906 × 129,906
  4. Step 4: Simplify right side
    59,985x = 16,875,568,836
  5. Step 5: Solve for x
    x = 16,875,568,836/59,985
  6. Step 6: Final answer
    x = 281,329.81

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.