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Finding the Fourth Proportional to 257,672.52, 386,550.15 and 80,220.54

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Solution

The fourth proportional to 257,672.52, 386,550.15 and 80,220.54 is: 120,343.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,672.52 : 386,550.15 = 80,220.54 : x
  2. Step 2: Convert to fraction form
    257,672.52/386,550.15 = 80,220.54/x
  3. Step 3: Cross multiply
    257,672.52x = 386,550.15 × 80,220.54
  4. Step 4: Simplify right side
    257,672.52x = 31,009,261,770.08
  5. Step 5: Solve for x
    x = 31,009,261,770.08/257,672.52
  6. Step 6: Final answer
    x = 120,343.69

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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.