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Finding the Third Proportional to 68,688 and 145,800

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Solution

The third proportional to 68,688 and 145,800 is: 309,481.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,688 : 145,800 = 145,800 : x
  2. Step 2: Convert to fraction form
    68,688/145,800 = 145,800/x
  3. Step 3: Cross multiply
    68,688x = 145,800 × 145,800
  4. Step 4: Simplify right side
    68,688x = 21,257,640,000
  5. Step 5: Solve for x
    x = 21,257,640,000/68,688
  6. Step 6: Final answer
    x = 309,481.13

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.