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Finding the Fourth Proportional to 219,673.40, 329,072.70 and 126,069.80

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Solution

The fourth proportional to 219,673.40, 329,072.70 and 126,069.80 is: 188,853.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,673.40 : 329,072.70 = 126,069.80 : x
  2. Step 2: Convert to fraction form
    219,673.40/329,072.70 = 126,069.80/x
  3. Step 3: Cross multiply
    219,673.40x = 329,072.70 × 126,069.80
  4. Step 4: Simplify right side
    219,673.40x = 41,486,129,474.46
  5. Step 5: Solve for x
    x = 41,486,129,474.46/219,673.40
  6. Step 6: Final answer
    x = 188,853.68

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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.