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Finding the Third Proportional to 90,309.75 and 140,634.75

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Solution

The third proportional to 90,309.75 and 140,634.75 is: 219,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,309.75 : 140,634.75 = 140,634.75 : x
  2. Step 2: Convert to fraction form
    90,309.75/140,634.75 = 140,634.75/x
  3. Step 3: Cross multiply
    90,309.75x = 140,634.75 × 140,634.75
  4. Step 4: Simplify right side
    90,309.75x = 19,778,132,907.56
  5. Step 5: Solve for x
    x = 19,778,132,907.56/90,309.75
  6. Step 6: Final answer
    x = 219,003.30

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.