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Finding the Fourth Proportional to 363,469.20, 545,009.40 and 126,819.60

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Solution

The fourth proportional to 363,469.20, 545,009.40 and 126,819.60 is: 190,161.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,469.20 : 545,009.40 = 126,819.60 : x
  2. Step 2: Convert to fraction form
    363,469.20/545,009.40 = 126,819.60/x
  3. Step 3: Cross multiply
    363,469.20x = 545,009.40 × 126,819.60
  4. Step 4: Simplify right side
    363,469.20x = 69,117,874,104.24
  5. Step 5: Solve for x
    x = 69,117,874,104.24/363,469.20
  6. Step 6: Final answer
    x = 190,161.57

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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.