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Finding the Third Proportional to 66,120 and 102,460

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Solution

The third proportional to 66,120 and 102,460 is: 158,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120 : 102,460 = 102,460 : x
  2. Step 2: Convert to fraction form
    66,120/102,460 = 102,460/x
  3. Step 3: Cross multiply
    66,120x = 102,460 × 102,460
  4. Step 4: Simplify right side
    66,120x = 10,498,051,600
  5. Step 5: Solve for x
    x = 10,498,051,600/66,120
  6. Step 6: Final answer
    x = 158,772.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.