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Finding the Fourth Proportional to 57,813.60, 86,720.40 and 38,114.40

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Solution

The fourth proportional to 57,813.60, 86,720.40 and 38,114.40 is: 57,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,813.60 : 86,720.40 = 38,114.40 : x
  2. Step 2: Convert to fraction form
    57,813.60/86,720.40 = 38,114.40/x
  3. Step 3: Cross multiply
    57,813.60x = 86,720.40 × 38,114.40
  4. Step 4: Simplify right side
    57,813.60x = 3,305,296,013.76
  5. Step 5: Solve for x
    x = 3,305,296,013.76/57,813.60
  6. Step 6: Final answer
    x = 57,171.60

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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.