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Finding the Fourth Proportional to 66,720.90, 100,081.44 and 16,801

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Solution

The fourth proportional to 66,720.90, 100,081.44 and 16,801 is: 25,201.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,720.90 : 100,081.44 = 16,801 : x
  2. Step 2: Convert to fraction form
    66,720.90/100,081.44 = 16,801/x
  3. Step 3: Cross multiply
    66,720.90x = 100,081.44 × 16,801
  4. Step 4: Simplify right side
    66,720.90x = 1,681,468,273.44
  5. Step 5: Solve for x
    x = 1,681,468,273.44/66,720.90
  6. Step 6: Final answer
    x = 25,201.52

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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.