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Finding the Fourth Proportional to 75,319.50, 112,979.22 and 28,572.38

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Solution

The fourth proportional to 75,319.50, 112,979.22 and 28,572.38 is: 42,858.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,319.50 : 112,979.22 = 28,572.38 : x
  2. Step 2: Convert to fraction form
    75,319.50/112,979.22 = 28,572.38/x
  3. Step 3: Cross multiply
    75,319.50x = 112,979.22 × 28,572.38
  4. Step 4: Simplify right side
    75,319.50x = 3,228,085,205.94
  5. Step 5: Solve for x
    x = 3,228,085,205.94/75,319.50
  6. Step 6: Final answer
    x = 42,858.56

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