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Finding the Third Proportional to 66,266.50 and 142,421

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Solution

The third proportional to 66,266.50 and 142,421 is: 306,093.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,266.50 : 142,421 = 142,421 : x
  2. Step 2: Convert to fraction form
    66,266.50/142,421 = 142,421/x
  3. Step 3: Cross multiply
    66,266.50x = 142,421 × 142,421
  4. Step 4: Simplify right side
    66,266.50x = 20,283,741,241
  5. Step 5: Solve for x
    x = 20,283,741,241/66,266.50
  6. Step 6: Final answer
    x = 306,093.44

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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.