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Finding the Fourth Proportional to 54,469.44, 81,649.08 and 21,168.72

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Solution

The fourth proportional to 54,469.44, 81,649.08 and 21,168.72 is: 31,731.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,469.44 : 81,649.08 = 21,168.72 : x
  2. Step 2: Convert to fraction form
    54,469.44/81,649.08 = 21,168.72/x
  3. Step 3: Cross multiply
    54,469.44x = 81,649.08 × 21,168.72
  4. Step 4: Simplify right side
    54,469.44x = 1,728,406,512.78
  5. Step 5: Solve for x
    x = 1,728,406,512.78/54,469.44
  6. Step 6: Final answer
    x = 31,731.67

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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.