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Finding the Fourth Proportional to 219,255.20, 328,785.60 and 100,865.60

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Solution

The fourth proportional to 219,255.20, 328,785.60 and 100,865.60 is: 151,253.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,255.20 : 328,785.60 = 100,865.60 : x
  2. Step 2: Convert to fraction form
    219,255.20/328,785.60 = 100,865.60/x
  3. Step 3: Cross multiply
    219,255.20x = 328,785.60 × 100,865.60
  4. Step 4: Simplify right side
    219,255.20x = 33,163,156,815.36
  5. Step 5: Solve for x
    x = 33,163,156,815.36/219,255.20
  6. Step 6: Final answer
    x = 151,253.68

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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.