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Finding the Fourth Proportional to 66,789.98, 100,025.94 and 38,650.70

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Solution

The fourth proportional to 66,789.98, 100,025.94 and 38,650.70 is: 57,884.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,789.98 : 100,025.94 = 38,650.70 : x
  2. Step 2: Convert to fraction form
    66,789.98/100,025.94 = 38,650.70/x
  3. Step 3: Cross multiply
    66,789.98x = 100,025.94 × 38,650.70
  4. Step 4: Simplify right side
    66,789.98x = 3,866,072,599.16
  5. Step 5: Solve for x
    x = 3,866,072,599.16/66,789.98
  6. Step 6: Final answer
    x = 57,884.02

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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.