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Finding the Fourth Proportional to 57,405.40, 86,108.10 and 34,019.80

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Solution

The fourth proportional to 57,405.40, 86,108.10 and 34,019.80 is: 51,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,405.40 : 86,108.10 = 34,019.80 : x
  2. Step 2: Convert to fraction form
    57,405.40/86,108.10 = 34,019.80/x
  3. Step 3: Cross multiply
    57,405.40x = 86,108.10 × 34,019.80
  4. Step 4: Simplify right side
    57,405.40x = 2,929,380,340.38
  5. Step 5: Solve for x
    x = 2,929,380,340.38/57,405.40
  6. Step 6: Final answer
    x = 51,029.70

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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.