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Finding the Fourth Proportional to 57,219.21, 85,807.71 and 19,769.67

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Solution

The fourth proportional to 57,219.21, 85,807.71 and 19,769.67 is: 29,647.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,219.21 : 85,807.71 = 19,769.67 : x
  2. Step 2: Convert to fraction form
    57,219.21/85,807.71 = 19,769.67/x
  3. Step 3: Cross multiply
    57,219.21x = 85,807.71 × 19,769.67
  4. Step 4: Simplify right side
    57,219.21x = 1,696,390,110.16
  5. Step 5: Solve for x
    x = 1,696,390,110.16/57,219.21
  6. Step 6: Final answer
    x = 29,647.21

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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.