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Finding the Fourth Proportional to 236,065.68, 325,766.43 and 128,636.55

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Solution

The fourth proportional to 236,065.68, 325,766.43 and 128,636.55 is: 177,516.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,065.68 : 325,766.43 = 128,636.55 : x
  2. Step 2: Convert to fraction form
    236,065.68/325,766.43 = 128,636.55/x
  3. Step 3: Cross multiply
    236,065.68x = 325,766.43 × 128,636.55
  4. Step 4: Simplify right side
    236,065.68x = 41,905,469,661.02
  5. Step 5: Solve for x
    x = 41,905,469,661.02/236,065.68
  6. Step 6: Final answer
    x = 177,516.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.