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Finding the Third Proportional to 66,840 and 143,760

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Solution

The third proportional to 66,840 and 143,760 is: 309,200.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,840 : 143,760 = 143,760 : x
  2. Step 2: Convert to fraction form
    66,840/143,760 = 143,760/x
  3. Step 3: Cross multiply
    66,840x = 143,760 × 143,760
  4. Step 4: Simplify right side
    66,840x = 20,666,937,600
  5. Step 5: Solve for x
    x = 20,666,937,600/66,840
  6. Step 6: Final answer
    x = 309,200.14

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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.