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Finding the Third Proportional to 142,692.75 and 309,161.25

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Solution

The third proportional to 142,692.75 and 309,161.25 is: 669,835.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,692.75 : 309,161.25 = 309,161.25 : x
  2. Step 2: Convert to fraction form
    142,692.75/309,161.25 = 309,161.25/x
  3. Step 3: Cross multiply
    142,692.75x = 309,161.25 × 309,161.25
  4. Step 4: Simplify right side
    142,692.75x = 95,580,678,501.56
  5. Step 5: Solve for x
    x = 95,580,678,501.56/142,692.75
  6. Step 6: Final answer
    x = 669,835.56

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.