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Finding the Fourth Proportional to 62,587.69, 86,342.05 and 55,424.90

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Solution

The fourth proportional to 62,587.69, 86,342.05 and 55,424.90 is: 76,460.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,587.69 : 86,342.05 = 55,424.90 : x
  2. Step 2: Convert to fraction form
    62,587.69/86,342.05 = 55,424.90/x
  3. Step 3: Cross multiply
    62,587.69x = 86,342.05 × 55,424.90
  4. Step 4: Simplify right side
    62,587.69x = 4,785,499,487.05
  5. Step 5: Solve for x
    x = 4,785,499,487.05/62,587.69
  6. Step 6: Final answer
    x = 76,460.71

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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.