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Finding the Fourth Proportional to 57,805.54, 86,715.26 and 20,357.88

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Solution

The fourth proportional to 57,805.54, 86,715.26 and 20,357.88 is: 30,539.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,805.54 : 86,715.26 = 20,357.88 : x
  2. Step 2: Convert to fraction form
    57,805.54/86,715.26 = 20,357.88/x
  3. Step 3: Cross multiply
    57,805.54x = 86,715.26 × 20,357.88
  4. Step 4: Simplify right side
    57,805.54x = 1,765,338,857.25
  5. Step 5: Solve for x
    x = 1,765,338,857.25/57,805.54
  6. Step 6: Final answer
    x = 30,539.27

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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.