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Finding the Fourth Proportional to 70,603.86, 105,930.09 and 44,277.78

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Solution

The fourth proportional to 70,603.86, 105,930.09 and 44,277.78 is: 66,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,603.86 : 105,930.09 = 44,277.78 : x
  2. Step 2: Convert to fraction form
    70,603.86/105,930.09 = 44,277.78/x
  3. Step 3: Cross multiply
    70,603.86x = 105,930.09 × 44,277.78
  4. Step 4: Simplify right side
    70,603.86x = 4,690,349,220.40
  5. Step 5: Solve for x
    x = 4,690,349,220.40/70,603.86
  6. Step 6: Final answer
    x = 66,431.91

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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.