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Finding the Fourth Proportional to 64,415.86, 96,578.52 and 28,375.22

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Solution

The fourth proportional to 64,415.86, 96,578.52 and 28,375.22 is: 42,542.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,415.86 : 96,578.52 = 28,375.22 : x
  2. Step 2: Convert to fraction form
    64,415.86/96,578.52 = 28,375.22/x
  3. Step 3: Cross multiply
    64,415.86x = 96,578.52 × 28,375.22
  4. Step 4: Simplify right side
    64,415.86x = 2,740,436,752.27
  5. Step 5: Solve for x
    x = 2,740,436,752.27/64,415.86
  6. Step 6: Final answer
    x = 42,542.89

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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.