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Finding the Fourth Proportional to 147,615.57, 221,806.09 and 128,945.88

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Solution

The fourth proportional to 147,615.57, 221,806.09 and 128,945.88 is: 193,753.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,615.57 : 221,806.09 = 128,945.88 : x
  2. Step 2: Convert to fraction form
    147,615.57/221,806.09 = 128,945.88/x
  3. Step 3: Cross multiply
    147,615.57x = 221,806.09 × 128,945.88
  4. Step 4: Simplify right side
    147,615.57x = 28,600,981,464.41
  5. Step 5: Solve for x
    x = 28,600,981,464.41/147,615.57
  6. Step 6: Final answer
    x = 193,753.15

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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.