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Finding the Fourth Proportional to 66,917.01, 100,380.38 and 20,173.53

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Solution

The fourth proportional to 66,917.01, 100,380.38 and 20,173.53 is: 30,261.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,917.01 : 100,380.38 = 20,173.53 : x
  2. Step 2: Convert to fraction form
    66,917.01/100,380.38 = 20,173.53/x
  3. Step 3: Cross multiply
    66,917.01x = 100,380.38 × 20,173.53
  4. Step 4: Simplify right side
    66,917.01x = 2,025,026,506.47
  5. Step 5: Solve for x
    x = 2,025,026,506.47/66,917.01
  6. Step 6: Final answer
    x = 30,261.76

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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.