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Finding the Fourth Proportional to 257,793.96, 386,662.29 and 80,286.12

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Solution

The fourth proportional to 257,793.96, 386,662.29 and 80,286.12 is: 120,420.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,793.96 : 386,662.29 = 80,286.12 : x
  2. Step 2: Convert to fraction form
    257,793.96/386,662.29 = 80,286.12/x
  3. Step 3: Cross multiply
    257,793.96x = 386,662.29 × 80,286.12
  4. Step 4: Simplify right side
    257,793.96x = 31,043,615,014.41
  5. Step 5: Solve for x
    x = 31,043,615,014.41/257,793.96
  6. Step 6: Final answer
    x = 120,420.26

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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.