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Finding the Fourth Proportional to 66,672.70, 100,023.45 and 19,930.30

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Solution

The fourth proportional to 66,672.70, 100,023.45 and 19,930.30 is: 29,899.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,672.70 : 100,023.45 = 19,930.30 : x
  2. Step 2: Convert to fraction form
    66,672.70/100,023.45 = 19,930.30/x
  3. Step 3: Cross multiply
    66,672.70x = 100,023.45 × 19,930.30
  4. Step 4: Simplify right side
    66,672.70x = 1,993,497,365.54
  5. Step 5: Solve for x
    x = 1,993,497,365.54/66,672.70
  6. Step 6: Final answer
    x = 29,899.75

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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.