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Finding the Fourth Proportional to 219,390.80, 329,086.20 and 125,819.60

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Solution

The fourth proportional to 219,390.80, 329,086.20 and 125,819.60 is: 188,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,390.80 : 329,086.20 = 125,819.60 : x
  2. Step 2: Convert to fraction form
    219,390.80/329,086.20 = 125,819.60/x
  3. Step 3: Cross multiply
    219,390.80x = 329,086.20 × 125,819.60
  4. Step 4: Simplify right side
    219,390.80x = 41,405,494,049.52
  5. Step 5: Solve for x
    x = 41,405,494,049.52/219,390.80
  6. Step 6: Final answer
    x = 188,729.40

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1.5x scale

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.