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Finding the Fourth Proportional to 57,200.40, 85,786.92 and 19,761.80

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Solution

The fourth proportional to 57,200.40, 85,786.92 and 19,761.80 is: 29,637.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,200.40 : 85,786.92 = 19,761.80 : x
  2. Step 2: Convert to fraction form
    57,200.40/85,786.92 = 19,761.80/x
  3. Step 3: Cross multiply
    57,200.40x = 85,786.92 × 19,761.80
  4. Step 4: Simplify right side
    57,200.40x = 1,695,303,955.66
  5. Step 5: Solve for x
    x = 1,695,303,955.66/57,200.40
  6. Step 6: Final answer
    x = 29,637.97

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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.