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Finding the Fourth Proportional to 66,919.21, 100,244.98 and 40,250.47

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Solution

The fourth proportional to 66,919.21, 100,244.98 and 40,250.47 is: 60,295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.21 : 100,244.98 = 40,250.47 : x
  2. Step 2: Convert to fraction form
    66,919.21/100,244.98 = 40,250.47/x
  3. Step 3: Cross multiply
    66,919.21x = 100,244.98 × 40,250.47
  4. Step 4: Simplify right side
    66,919.21x = 4,034,907,808.38
  5. Step 5: Solve for x
    x = 4,034,907,808.38/66,919.21
  6. Step 6: Final answer
    x = 60,295.21

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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.