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Finding the Fourth Proportional to 66,899.98, 100,349.97 and 20,152.86

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Solution

The fourth proportional to 66,899.98, 100,349.97 and 20,152.86 is: 30,229.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,899.98 : 100,349.97 = 20,152.86 : x
  2. Step 2: Convert to fraction form
    66,899.98/100,349.97 = 20,152.86/x
  3. Step 3: Cross multiply
    66,899.98x = 100,349.97 × 20,152.86
  4. Step 4: Simplify right side
    66,899.98x = 2,022,338,896.41
  5. Step 5: Solve for x
    x = 2,022,338,896.41/66,899.98
  6. Step 6: Final answer
    x = 30,229.29

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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.