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Finding the Fourth Proportional to 57,722.40, 86,583.60 and 51,112.80

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Solution

The fourth proportional to 57,722.40, 86,583.60 and 51,112.80 is: 76,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,722.40 : 86,583.60 = 51,112.80 : x
  2. Step 2: Convert to fraction form
    57,722.40/86,583.60 = 51,112.80/x
  3. Step 3: Cross multiply
    57,722.40x = 86,583.60 × 51,112.80
  4. Step 4: Simplify right side
    57,722.40x = 4,425,530,230.08
  5. Step 5: Solve for x
    x = 4,425,530,230.08/57,722.40
  6. Step 6: Final answer
    x = 76,669.20

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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.