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Finding the Fourth Proportional to 220,897.76, 331,346.64 and 54,685.76

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Solution

The fourth proportional to 220,897.76, 331,346.64 and 54,685.76 is: 82,028.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,897.76 : 331,346.64 = 54,685.76 : x
  2. Step 2: Convert to fraction form
    220,897.76/331,346.64 = 54,685.76/x
  3. Step 3: Cross multiply
    220,897.76x = 331,346.64 × 54,685.76
  4. Step 4: Simplify right side
    220,897.76x = 18,119,942,831.85
  5. Step 5: Solve for x
    x = 18,119,942,831.85/220,897.76
  6. Step 6: Final answer
    x = 82,028.64

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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.