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Finding the Fourth Proportional to 76,559.66, 105,615.54 and 49,710.60

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Solution

The fourth proportional to 76,559.66, 105,615.54 and 49,710.60 is: 68,576.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,559.66 : 105,615.54 = 49,710.60 : x
  2. Step 2: Convert to fraction form
    76,559.66/105,615.54 = 49,710.60/x
  3. Step 3: Cross multiply
    76,559.66x = 105,615.54 × 49,710.60
  4. Step 4: Simplify right side
    76,559.66x = 5,250,211,862.72
  5. Step 5: Solve for x
    x = 5,250,211,862.72/76,559.66
  6. Step 6: Final answer
    x = 68,576.74

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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.