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Finding the Fourth Proportional to 323,838.67, 485,790.41 and 99,196.51

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Solution

The fourth proportional to 323,838.67, 485,790.41 and 99,196.51 is: 148,804.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,838.67 : 485,790.41 = 99,196.51 : x
  2. Step 2: Convert to fraction form
    323,838.67/485,790.41 = 99,196.51/x
  3. Step 3: Cross multiply
    323,838.67x = 485,790.41 × 99,196.51
  4. Step 4: Simplify right side
    323,838.67x = 48,188,713,263.47
  5. Step 5: Solve for x
    x = 48,188,713,263.47/323,838.67
  6. Step 6: Final answer
    x = 148,804.69

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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.