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Finding the Fourth Proportional to 252,752.78, 378,859.43 and 126,143.70

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Solution

The fourth proportional to 252,752.78, 378,859.43 and 126,143.70 is: 189,080.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,752.78 : 378,859.43 = 126,143.70 : x
  2. Step 2: Convert to fraction form
    252,752.78/378,859.43 = 126,143.70/x
  3. Step 3: Cross multiply
    252,752.78x = 378,859.43 × 126,143.70
  4. Step 4: Simplify right side
    252,752.78x = 47,790,729,649.37
  5. Step 5: Solve for x
    x = 47,790,729,649.37/252,752.78
  6. Step 6: Final answer
    x = 189,080.93

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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.