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Finding the Third Proportional to 66,555 and 143,142

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Solution

The third proportional to 66,555 and 143,142 is: 307,860.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,555 : 143,142 = 143,142 : x
  2. Step 2: Convert to fraction form
    66,555/143,142 = 143,142/x
  3. Step 3: Cross multiply
    66,555x = 143,142 × 143,142
  4. Step 4: Simplify right side
    66,555x = 20,489,632,164
  5. Step 5: Solve for x
    x = 20,489,632,164/66,555
  6. Step 6: Final answer
    x = 307,860.15

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.