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Finding the Third Proportional to 66,415.50 and 143,326

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Solution

The third proportional to 66,415.50 and 143,326 is: 309,300.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415.50 : 143,326 = 143,326 : x
  2. Step 2: Convert to fraction form
    66,415.50/143,326 = 143,326/x
  3. Step 3: Cross multiply
    66,415.50x = 143,326 × 143,326
  4. Step 4: Simplify right side
    66,415.50x = 20,542,342,276
  5. Step 5: Solve for x
    x = 20,542,342,276/66,415.50
  6. Step 6: Final answer
    x = 309,300.42

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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.