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Finding the Fourth Proportional to 57,980.61, 87,365.79 and 47,681.33

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Solution

The fourth proportional to 57,980.61, 87,365.79 and 47,681.33 is: 71,846.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,980.61 : 87,365.79 = 47,681.33 : x
  2. Step 2: Convert to fraction form
    57,980.61/87,365.79 = 47,681.33/x
  3. Step 3: Cross multiply
    57,980.61x = 87,365.79 × 47,681.33
  4. Step 4: Simplify right side
    57,980.61x = 4,165,716,626.87
  5. Step 5: Solve for x
    x = 4,165,716,626.87/57,980.61
  6. Step 6: Final answer
    x = 71,846.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.