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Finding the Fourth Proportional to 321,351.86, 482,031.89 and 121,618.61

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Solution

The fourth proportional to 321,351.86, 482,031.89 and 121,618.61 is: 182,429.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,351.86 : 482,031.89 = 121,618.61 : x
  2. Step 2: Convert to fraction form
    321,351.86/482,031.89 = 121,618.61/x
  3. Step 3: Cross multiply
    321,351.86x = 482,031.89 × 121,618.61
  4. Step 4: Simplify right side
    321,351.86x = 58,624,050,052.29
  5. Step 5: Solve for x
    x = 58,624,050,052.29/321,351.86
  6. Step 6: Final answer
    x = 182,429.47

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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.