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Finding the Fourth Proportional to 395,361.32, 593,078.44 and 129,123.22

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Solution

The fourth proportional to 395,361.32, 593,078.44 and 129,123.22 is: 193,696.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,361.32 : 593,078.44 = 129,123.22 : x
  2. Step 2: Convert to fraction form
    395,361.32/593,078.44 = 129,123.22/x
  3. Step 3: Cross multiply
    395,361.32x = 593,078.44 × 129,123.22
  4. Step 4: Simplify right side
    395,361.32x = 76,580,197,885.38
  5. Step 5: Solve for x
    x = 76,580,197,885.38/395,361.32
  6. Step 6: Final answer
    x = 193,696.74

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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.