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Finding the Fourth Proportional to 128,751.56, 193,135.82 and 44,519.87

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Solution

The fourth proportional to 128,751.56, 193,135.82 and 44,519.87 is: 66,782.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,751.56 : 193,135.82 = 44,519.87 : x
  2. Step 2: Convert to fraction form
    128,751.56/193,135.82 = 44,519.87/x
  3. Step 3: Cross multiply
    128,751.56x = 193,135.82 × 44,519.87
  4. Step 4: Simplify right side
    128,751.56x = 8,598,380,744.36
  5. Step 5: Solve for x
    x = 8,598,380,744.36/128,751.56
  6. Step 6: Final answer
    x = 66,782.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.