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Finding the Fourth Proportional to 57,978.72, 86,997.26 and 43,217.28

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Solution

The fourth proportional to 57,978.72, 86,997.26 and 43,217.28 is: 64,847.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,978.72 : 86,997.26 = 43,217.28 : x
  2. Step 2: Convert to fraction form
    57,978.72/86,997.26 = 43,217.28/x
  3. Step 3: Cross multiply
    57,978.72x = 86,997.26 × 43,217.28
  4. Step 4: Simplify right side
    57,978.72x = 3,759,784,944.65
  5. Step 5: Solve for x
    x = 3,759,784,944.65/57,978.72
  6. Step 6: Final answer
    x = 64,847.67

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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.