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Finding the Third Proportional to 66,417 and 143,331

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Solution

The third proportional to 66,417 and 143,331 is: 309,315.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,417 : 143,331 = 143,331 : x
  2. Step 2: Convert to fraction form
    66,417/143,331 = 143,331/x
  3. Step 3: Cross multiply
    66,417x = 143,331 × 143,331
  4. Step 4: Simplify right side
    66,417x = 20,543,775,561
  5. Step 5: Solve for x
    x = 20,543,775,561/66,417
  6. Step 6: Final answer
    x = 309,315.02

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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.