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Finding the Fourth Proportional to 219,668.20, 329,502.30 and 131,021.80

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Solution

The fourth proportional to 219,668.20, 329,502.30 and 131,021.80 is: 196,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,668.20 : 329,502.30 = 131,021.80 : x
  2. Step 2: Convert to fraction form
    219,668.20/329,502.30 = 131,021.80/x
  3. Step 3: Cross multiply
    219,668.20x = 329,502.30 × 131,021.80
  4. Step 4: Simplify right side
    219,668.20x = 43,171,984,450.14
  5. Step 5: Solve for x
    x = 43,171,984,450.14/219,668.20
  6. Step 6: Final answer
    x = 196,532.70

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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.