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Finding the Fourth Proportional to 219,891.60, 329,794.20 and 72,147.60

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Solution

The fourth proportional to 219,891.60, 329,794.20 and 72,147.60 is: 108,207.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,891.60 : 329,794.20 = 72,147.60 : x
  2. Step 2: Convert to fraction form
    219,891.60/329,794.20 = 72,147.60/x
  3. Step 3: Cross multiply
    219,891.60x = 329,794.20 × 72,147.60
  4. Step 4: Simplify right side
    219,891.60x = 23,793,860,023.92
  5. Step 5: Solve for x
    x = 23,793,860,023.92/219,891.60
  6. Step 6: Final answer
    x = 108,207.23

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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.