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Finding the Fourth Proportional to 321,400.76, 481,920.42 and 131,808.92

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Solution

The fourth proportional to 321,400.76, 481,920.42 and 131,808.92 is: 197,639.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,400.76 : 481,920.42 = 131,808.92 : x
  2. Step 2: Convert to fraction form
    321,400.76/481,920.42 = 131,808.92/x
  3. Step 3: Cross multiply
    321,400.76x = 481,920.42 × 131,808.92
  4. Step 4: Simplify right side
    321,400.76x = 63,521,410,086.15
  5. Step 5: Solve for x
    x = 63,521,410,086.15/321,400.76
  6. Step 6: Final answer
    x = 197,639.27

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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.