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Finding the Fourth Proportional to 66,961.77, 100,439.77 and 20,213.25

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Solution

The fourth proportional to 66,961.77, 100,439.77 and 20,213.25 is: 30,319.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,961.77 : 100,439.77 = 20,213.25 : x
  2. Step 2: Convert to fraction form
    66,961.77/100,439.77 = 20,213.25/x
  3. Step 3: Cross multiply
    66,961.77x = 100,439.77 × 20,213.25
  4. Step 4: Simplify right side
    66,961.77x = 2,030,214,180.95
  5. Step 5: Solve for x
    x = 2,030,214,180.95/66,961.77
  6. Step 6: Final answer
    x = 30,319.00

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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.