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Finding the Fourth Proportional to 259,807.62, 389,736.26 and 72,818.58

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Solution

The fourth proportional to 259,807.62, 389,736.26 and 72,818.58 is: 109,234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,807.62 : 389,736.26 = 72,818.58 : x
  2. Step 2: Convert to fraction form
    259,807.62/389,736.26 = 72,818.58/x
  3. Step 3: Cross multiply
    259,807.62x = 389,736.26 × 72,818.58
  4. Step 4: Simplify right side
    259,807.62x = 28,380,041,027.71
  5. Step 5: Solve for x
    x = 28,380,041,027.71/259,807.62
  6. Step 6: Final answer
    x = 109,234.83

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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.