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Finding the Third Proportional to 66,389 and 143,344

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Solution

The third proportional to 66,389 and 143,344 is: 309,501.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389 : 143,344 = 143,344 : x
  2. Step 2: Convert to fraction form
    66,389/143,344 = 143,344/x
  3. Step 3: Cross multiply
    66,389x = 143,344 × 143,344
  4. Step 4: Simplify right side
    66,389x = 20,547,502,336
  5. Step 5: Solve for x
    x = 20,547,502,336/66,389
  6. Step 6: Final answer
    x = 309,501.61

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.