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Finding the Third Proportional to 66,786 and 136,040

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Solution

The third proportional to 66,786 and 136,040 is: 277,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,786 : 136,040 = 136,040 : x
  2. Step 2: Convert to fraction form
    66,786/136,040 = 136,040/x
  3. Step 3: Cross multiply
    66,786x = 136,040 × 136,040
  4. Step 4: Simplify right side
    66,786x = 18,506,881,600
  5. Step 5: Solve for x
    x = 18,506,881,600/66,786
  6. Step 6: Final answer
    x = 277,107.20

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.