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Finding the Third Proportional to 66,368 and 145,856

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Solution

The third proportional to 66,368 and 145,856 is: 320,545.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,368 : 145,856 = 145,856 : x
  2. Step 2: Convert to fraction form
    66,368/145,856 = 145,856/x
  3. Step 3: Cross multiply
    66,368x = 145,856 × 145,856
  4. Step 4: Simplify right side
    66,368x = 21,273,972,736
  5. Step 5: Solve for x
    x = 21,273,972,736/66,368
  6. Step 6: Final answer
    x = 320,545.64

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.