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Finding the Fourth Proportional to 66,773.21, 100,169.73 and 19,388.70

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Solution

The fourth proportional to 66,773.21, 100,169.73 and 19,388.70 is: 29,085.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,773.21 : 100,169.73 = 19,388.70 : x
  2. Step 2: Convert to fraction form
    66,773.21/100,169.73 = 19,388.70/x
  3. Step 3: Cross multiply
    66,773.21x = 100,169.73 × 19,388.70
  4. Step 4: Simplify right side
    66,773.21x = 1,942,160,844.05
  5. Step 5: Solve for x
    x = 1,942,160,844.05/66,773.21
  6. Step 6: Final answer
    x = 29,085.93

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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.