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Finding the Fourth Proportional to 76,605.01, 105,721.91 and 44,778.69

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Solution

The fourth proportional to 76,605.01, 105,721.91 and 44,778.69 is: 61,798.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,605.01 : 105,721.91 = 44,778.69 : x
  2. Step 2: Convert to fraction form
    76,605.01/105,721.91 = 44,778.69/x
  3. Step 3: Cross multiply
    76,605.01x = 105,721.91 × 44,778.69
  4. Step 4: Simplify right side
    76,605.01x = 4,734,088,578.12
  5. Step 5: Solve for x
    x = 4,734,088,578.12/76,605.01
  6. Step 6: Final answer
    x = 61,798.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.