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Finding the Fourth Proportional to 257,369.95, 386,105.96 and 79,869.39

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Solution

The fourth proportional to 257,369.95, 386,105.96 and 79,869.39 is: 119,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,369.95 : 386,105.96 = 79,869.39 : x
  2. Step 2: Convert to fraction form
    257,369.95/386,105.96 = 79,869.39/x
  3. Step 3: Cross multiply
    257,369.95x = 386,105.96 × 79,869.39
  4. Step 4: Simplify right side
    257,369.95x = 30,838,047,500.56
  5. Step 5: Solve for x
    x = 30,838,047,500.56/257,369.95
  6. Step 6: Final answer
    x = 119,819.92

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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.