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Finding the Fourth Proportional to 57,809.20, 86,616.60 and 47,894.80

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Solution

The fourth proportional to 57,809.20, 86,616.60 and 47,894.80 is: 71,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,809.20 : 86,616.60 = 47,894.80 : x
  2. Step 2: Convert to fraction form
    57,809.20/86,616.60 = 47,894.80/x
  3. Step 3: Cross multiply
    57,809.20x = 86,616.60 × 47,894.80
  4. Step 4: Simplify right side
    57,809.20x = 4,148,484,733.68
  5. Step 5: Solve for x
    x = 4,148,484,733.68/57,809.20
  6. Step 6: Final answer
    x = 71,761.67

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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.