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Finding the Fourth Proportional to 49,790.70, 74,831.85 and 48,915.90

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Solution

The fourth proportional to 49,790.70, 74,831.85 and 48,915.90 is: 73,517.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,790.70 : 74,831.85 = 48,915.90 : x
  2. Step 2: Convert to fraction form
    49,790.70/74,831.85 = 48,915.90/x
  3. Step 3: Cross multiply
    49,790.70x = 74,831.85 × 48,915.90
  4. Step 4: Simplify right side
    49,790.70x = 3,660,467,291.42
  5. Step 5: Solve for x
    x = 3,660,467,291.42/49,790.70
  6. Step 6: Final answer
    x = 73,517.09

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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.