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Finding the Fourth Proportional to 57,745.80, 86,618.70 and 28,148.40

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Solution

The fourth proportional to 57,745.80, 86,618.70 and 28,148.40 is: 42,222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,745.80 : 86,618.70 = 28,148.40 : x
  2. Step 2: Convert to fraction form
    57,745.80/86,618.70 = 28,148.40/x
  3. Step 3: Cross multiply
    57,745.80x = 86,618.70 × 28,148.40
  4. Step 4: Simplify right side
    57,745.80x = 2,438,177,815.08
  5. Step 5: Solve for x
    x = 2,438,177,815.08/57,745.80
  6. Step 6: Final answer
    x = 42,222.60

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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.