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Finding the Fourth Proportional to 78,606.72, 108,479.28 and 44,617.68

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Solution

The fourth proportional to 78,606.72, 108,479.28 and 44,617.68 is: 61,573.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,606.72 : 108,479.28 = 44,617.68 : x
  2. Step 2: Convert to fraction form
    78,606.72/108,479.28 = 44,617.68/x
  3. Step 3: Cross multiply
    78,606.72x = 108,479.28 × 44,617.68
  4. Step 4: Simplify right side
    78,606.72x = 4,840,093,801.67
  5. Step 5: Solve for x
    x = 4,840,093,801.67/78,606.72
  6. Step 6: Final answer
    x = 61,573.54

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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.