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Finding the Fourth Proportional to 66,790.80, 100,190.88 and 20,047.20

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Solution

The fourth proportional to 66,790.80, 100,190.88 and 20,047.20 is: 30,072.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,790.80 : 100,190.88 = 20,047.20 : x
  2. Step 2: Convert to fraction form
    66,790.80/100,190.88 = 20,047.20/x
  3. Step 3: Cross multiply
    66,790.80x = 100,190.88 × 20,047.20
  4. Step 4: Simplify right side
    66,790.80x = 2,008,546,609.54
  5. Step 5: Solve for x
    x = 2,008,546,609.54/66,790.80
  6. Step 6: Final answer
    x = 30,072.20

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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.