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Finding the Fourth Proportional to 57,803.99, 86,707.53 and 20,355.56

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Solution

The fourth proportional to 57,803.99, 86,707.53 and 20,355.56 is: 30,533.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,803.99 : 86,707.53 = 20,355.56 : x
  2. Step 2: Convert to fraction form
    57,803.99/86,707.53 = 20,355.56/x
  3. Step 3: Cross multiply
    57,803.99x = 86,707.53 × 20,355.56
  4. Step 4: Simplify right side
    57,803.99x = 1,764,979,895.83
  5. Step 5: Solve for x
    x = 1,764,979,895.83/57,803.99
  6. Step 6: Final answer
    x = 30,533.88

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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.