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Finding the Fourth Proportional to 57,793.60, 86,690.40 and 39,131.20

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Solution

The fourth proportional to 57,793.60, 86,690.40 and 39,131.20 is: 58,696.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,793.60 : 86,690.40 = 39,131.20 : x
  2. Step 2: Convert to fraction form
    57,793.60/86,690.40 = 39,131.20/x
  3. Step 3: Cross multiply
    57,793.60x = 86,690.40 × 39,131.20
  4. Step 4: Simplify right side
    57,793.60x = 3,392,299,380.48
  5. Step 5: Solve for x
    x = 3,392,299,380.48/57,793.60
  6. Step 6: Final answer
    x = 58,696.80

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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.