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Finding the Fourth Proportional to 57,846.80, 86,624.40 and 42,975.20

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Solution

The fourth proportional to 57,846.80, 86,624.40 and 42,975.20 is: 64,354.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,846.80 : 86,624.40 = 42,975.20 : x
  2. Step 2: Convert to fraction form
    57,846.80/86,624.40 = 42,975.20/x
  3. Step 3: Cross multiply
    57,846.80x = 86,624.40 × 42,975.20
  4. Step 4: Simplify right side
    57,846.80x = 3,722,700,914.88
  5. Step 5: Solve for x
    x = 3,722,700,914.88/57,846.80
  6. Step 6: Final answer
    x = 64,354.48

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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.