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Finding the Fourth Proportional to 262,429.60, 393,375.60 and 129,104.80

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Solution

The fourth proportional to 262,429.60, 393,375.60 and 129,104.80 is: 193,524.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,429.60 : 393,375.60 = 129,104.80 : x
  2. Step 2: Convert to fraction form
    262,429.60/393,375.60 = 129,104.80/x
  3. Step 3: Cross multiply
    262,429.60x = 393,375.60 × 129,104.80
  4. Step 4: Simplify right side
    262,429.60x = 50,786,678,162.88
  5. Step 5: Solve for x
    x = 50,786,678,162.88/262,429.60
  6. Step 6: Final answer
    x = 193,524.96

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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.