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Finding the Fourth Proportional to 58,286.75, 87,408.68 and 20,836.67

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Solution

The fourth proportional to 58,286.75, 87,408.68 and 20,836.67 is: 31,247.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,286.75 : 87,408.68 = 20,836.67 : x
  2. Step 2: Convert to fraction form
    58,286.75/87,408.68 = 20,836.67/x
  3. Step 3: Cross multiply
    58,286.75x = 87,408.68 × 20,836.67
  4. Step 4: Simplify right side
    58,286.75x = 1,821,305,279.07
  5. Step 5: Solve for x
    x = 1,821,305,279.07/58,286.75
  6. Step 6: Final answer
    x = 31,247.33

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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.