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Finding the Fourth Proportional to 219,668.40, 329,065.20 and 126,064.80

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Solution

The fourth proportional to 219,668.40, 329,065.20 and 126,064.80 is: 188,846.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,668.40 : 329,065.20 = 126,064.80 : x
  2. Step 2: Convert to fraction form
    219,668.40/329,065.20 = 126,064.80/x
  3. Step 3: Cross multiply
    219,668.40x = 329,065.20 × 126,064.80
  4. Step 4: Simplify right side
    219,668.40x = 41,483,538,624.96
  5. Step 5: Solve for x
    x = 41,483,538,624.96/219,668.40
  6. Step 6: Final answer
    x = 188,846.18

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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.