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Finding the Fourth Proportional to 66,912.80, 100,344.90 and 33,621.80

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Solution

The fourth proportional to 66,912.80, 100,344.90 and 33,621.80 is: 50,420.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,912.80 : 100,344.90 = 33,621.80 : x
  2. Step 2: Convert to fraction form
    66,912.80/100,344.90 = 33,621.80/x
  3. Step 3: Cross multiply
    66,912.80x = 100,344.90 × 33,621.80
  4. Step 4: Simplify right side
    66,912.80x = 3,373,776,158.82
  5. Step 5: Solve for x
    x = 3,373,776,158.82/66,912.80
  6. Step 6: Final answer
    x = 50,420.49

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1.5x scale

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.