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Finding the Fourth Proportional to 53,239.61, 79,791.58 and 28,291.61

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Solution

The fourth proportional to 53,239.61, 79,791.58 and 28,291.61 is: 42,401.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,239.61 : 79,791.58 = 28,291.61 : x
  2. Step 2: Convert to fraction form
    53,239.61/79,791.58 = 28,291.61/x
  3. Step 3: Cross multiply
    53,239.61x = 79,791.58 × 28,291.61
  4. Step 4: Simplify right side
    53,239.61x = 2,257,432,497.49
  5. Step 5: Solve for x
    x = 2,257,432,497.49/53,239.61
  6. Step 6: Final answer
    x = 42,401.37

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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.