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Finding the Fourth Proportional to 253,986.34, 381,000.21 and 127,561.54

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Solution

The fourth proportional to 253,986.34, 381,000.21 and 127,561.54 is: 191,352.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,986.34 : 381,000.21 = 127,561.54 : x
  2. Step 2: Convert to fraction form
    253,986.34/381,000.21 = 127,561.54/x
  3. Step 3: Cross multiply
    253,986.34x = 381,000.21 × 127,561.54
  4. Step 4: Simplify right side
    253,986.34x = 48,600,973,053.78
  5. Step 5: Solve for x
    x = 48,600,973,053.78/253,986.34
  6. Step 6: Final answer
    x = 191,352.71

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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.