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Finding the Fourth Proportional to 66,975.80, 100,427.20 and 20,222.60

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Solution

The fourth proportional to 66,975.80, 100,427.20 and 20,222.60 is: 30,322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,975.80 : 100,427.20 = 20,222.60 : x
  2. Step 2: Convert to fraction form
    66,975.80/100,427.20 = 20,222.60/x
  3. Step 3: Cross multiply
    66,975.80x = 100,427.20 × 20,222.60
  4. Step 4: Simplify right side
    66,975.80x = 2,030,899,094.72
  5. Step 5: Solve for x
    x = 2,030,899,094.72/66,975.80
  6. Step 6: Final answer
    x = 30,322.88

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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.