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Finding the Fourth Proportional to 57,336.40, 86,004.60 and 51,212.80

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Solution

The fourth proportional to 57,336.40, 86,004.60 and 51,212.80 is: 76,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,336.40 : 86,004.60 = 51,212.80 : x
  2. Step 2: Convert to fraction form
    57,336.40/86,004.60 = 51,212.80/x
  3. Step 3: Cross multiply
    57,336.40x = 86,004.60 × 51,212.80
  4. Step 4: Simplify right side
    57,336.40x = 4,404,536,378.88
  5. Step 5: Solve for x
    x = 4,404,536,378.88/57,336.40
  6. Step 6: Final answer
    x = 76,819.20

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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.