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Finding the Fourth Proportional to 57,858.80, 86,764.50 and 18,405.32

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Solution

The fourth proportional to 57,858.80, 86,764.50 and 18,405.32 is: 27,600.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,858.80 : 86,764.50 = 18,405.32 : x
  2. Step 2: Convert to fraction form
    57,858.80/86,764.50 = 18,405.32/x
  3. Step 3: Cross multiply
    57,858.80x = 86,764.50 × 18,405.32
  4. Step 4: Simplify right side
    57,858.80x = 1,596,927,953.32
  5. Step 5: Solve for x
    x = 1,596,927,953.32/57,858.80
  6. Step 6: Final answer
    x = 27,600.44

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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.