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Finding the Fourth Proportional to 321,778.36, 482,668.15 and 132,106.67

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Solution

The fourth proportional to 321,778.36, 482,668.15 and 132,106.67 is: 198,160.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,778.36 : 482,668.15 = 132,106.67 : x
  2. Step 2: Convert to fraction form
    321,778.36/482,668.15 = 132,106.67/x
  3. Step 3: Cross multiply
    321,778.36x = 482,668.15 × 132,106.67
  4. Step 4: Simplify right side
    321,778.36x = 63,763,682,011.56
  5. Step 5: Solve for x
    x = 63,763,682,011.56/321,778.36
  6. Step 6: Final answer
    x = 198,160.26

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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.