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Finding the Fourth Proportional to 219,664.40, 329,059.20 and 126,060.80

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Solution

The fourth proportional to 219,664.40, 329,059.20 and 126,060.80 is: 188,840.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,664.40 : 329,059.20 = 126,060.80 : x
  2. Step 2: Convert to fraction form
    219,664.40/329,059.20 = 126,060.80/x
  3. Step 3: Cross multiply
    219,664.40x = 329,059.20 × 126,060.80
  4. Step 4: Simplify right side
    219,664.40x = 41,481,465,999.36
  5. Step 5: Solve for x
    x = 41,481,465,999.36/219,664.40
  6. Step 6: Final answer
    x = 188,840.19

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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.