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Finding the Fourth Proportional to 57,581.20, 86,396.88 and 20,168.16

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Solution

The fourth proportional to 57,581.20, 86,396.88 and 20,168.16 is: 30,261.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,581.20 : 86,396.88 = 20,168.16 : x
  2. Step 2: Convert to fraction form
    57,581.20/86,396.88 = 20,168.16/x
  3. Step 3: Cross multiply
    57,581.20x = 86,396.88 × 20,168.16
  4. Step 4: Simplify right side
    57,581.20x = 1,742,466,099.34
  5. Step 5: Solve for x
    x = 1,742,466,099.34/57,581.20
  6. Step 6: Final answer
    x = 30,261.02

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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.