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Finding the Fourth Proportional to 64,977.44, 97,469.60 and 20,600.78

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Solution

The fourth proportional to 64,977.44, 97,469.60 and 20,600.78 is: 30,902.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,977.44 : 97,469.60 = 20,600.78 : x
  2. Step 2: Convert to fraction form
    64,977.44/97,469.60 = 20,600.78/x
  3. Step 3: Cross multiply
    64,977.44x = 97,469.60 × 20,600.78
  4. Step 4: Simplify right side
    64,977.44x = 2,007,949,195.94
  5. Step 5: Solve for x
    x = 2,007,949,195.94/64,977.44
  6. Step 6: Final answer
    x = 30,902.25

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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.