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Finding the Fourth Proportional to 72,790.26, 100,484.52 and 42,571.41

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Solution

The fourth proportional to 72,790.26, 100,484.52 and 42,571.41 is: 58,768.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,790.26 : 100,484.52 = 42,571.41 : x
  2. Step 2: Convert to fraction form
    72,790.26/100,484.52 = 42,571.41/x
  3. Step 3: Cross multiply
    72,790.26x = 100,484.52 × 42,571.41
  4. Step 4: Simplify right side
    72,790.26x = 4,277,767,699.57
  5. Step 5: Solve for x
    x = 4,277,767,699.57/72,790.26
  6. Step 6: Final answer
    x = 58,768.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.