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Finding the Fourth Proportional to 219,390.60, 329,120.69 and 84,449.96

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Solution

The fourth proportional to 219,390.60, 329,120.69 and 84,449.96 is: 126,688.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,390.60 : 329,120.69 = 84,449.96 : x
  2. Step 2: Convert to fraction form
    219,390.60/329,120.69 = 84,449.96/x
  3. Step 3: Cross multiply
    219,390.60x = 329,120.69 × 84,449.96
  4. Step 4: Simplify right side
    219,390.60x = 27,794,227,037.82
  5. Step 5: Solve for x
    x = 27,794,227,037.82/219,390.60
  6. Step 6: Final answer
    x = 126,688.32

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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.