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Finding the Fourth Proportional to 57,218.21, 85,806.21 and 19,768.67

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Solution

The fourth proportional to 57,218.21, 85,806.21 and 19,768.67 is: 29,645.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,218.21 : 85,806.21 = 19,768.67 : x
  2. Step 2: Convert to fraction form
    57,218.21/85,806.21 = 19,768.67/x
  3. Step 3: Cross multiply
    57,218.21x = 85,806.21 × 19,768.67
  4. Step 4: Simplify right side
    57,218.21x = 1,696,274,649.44
  5. Step 5: Solve for x
    x = 1,696,274,649.44/57,218.21
  6. Step 6: Final answer
    x = 29,645.71

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1.5x scale

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.