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Finding the Fourth Proportional to 47,391.72, 71,063.72 and 15,790.58

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Solution

The fourth proportional to 47,391.72, 71,063.72 and 15,790.58 is: 23,677.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,391.72 : 71,063.72 = 15,790.58 : x
  2. Step 2: Convert to fraction form
    47,391.72/71,063.72 = 15,790.58/x
  3. Step 3: Cross multiply
    47,391.72x = 71,063.72 × 15,790.58
  4. Step 4: Simplify right side
    47,391.72x = 1,122,137,355.76
  5. Step 5: Solve for x
    x = 1,122,137,355.76/47,391.72
  6. Step 6: Final answer
    x = 23,677.92

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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.