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Finding the Fourth Proportional to 57,157.72, 85,736.58 and 19,728.52

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Solution

The fourth proportional to 57,157.72, 85,736.58 and 19,728.52 is: 29,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,157.72 : 85,736.58 = 19,728.52 : x
  2. Step 2: Convert to fraction form
    57,157.72/85,736.58 = 19,728.52/x
  3. Step 3: Cross multiply
    57,157.72x = 85,736.58 × 19,728.52
  4. Step 4: Simplify right side
    57,157.72x = 1,691,455,833.26
  5. Step 5: Solve for x
    x = 1,691,455,833.26/57,157.72
  6. Step 6: Final answer
    x = 29,592.78

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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.