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Finding the Fourth Proportional to 103,831.20, 155,689.20 and 44,656.80

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Solution

The fourth proportional to 103,831.20, 155,689.20 and 44,656.80 is: 66,960.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,831.20 : 155,689.20 = 44,656.80 : x
  2. Step 2: Convert to fraction form
    103,831.20/155,689.20 = 44,656.80/x
  3. Step 3: Cross multiply
    103,831.20x = 155,689.20 × 44,656.80
  4. Step 4: Simplify right side
    103,831.20x = 6,952,581,466.56
  5. Step 5: Solve for x
    x = 6,952,581,466.56/103,831.20
  6. Step 6: Final answer
    x = 66,960.43

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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.