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Finding the Fourth Proportional to 52,708.92, 79,064.64 and 20,686.62

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Solution

The fourth proportional to 52,708.92, 79,064.64 and 20,686.62 is: 31,030.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,708.92 : 79,064.64 = 20,686.62 : x
  2. Step 2: Convert to fraction form
    52,708.92/79,064.64 = 20,686.62/x
  3. Step 3: Cross multiply
    52,708.92x = 79,064.64 × 20,686.62
  4. Step 4: Simplify right side
    52,708.92x = 1,635,580,163.12
  5. Step 5: Solve for x
    x = 1,635,580,163.12/52,708.92
  6. Step 6: Final answer
    x = 31,030.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.