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Finding the Fourth Proportional to 66,911.08, 100,375.80 and 38,844.31

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Solution

The fourth proportional to 66,911.08, 100,375.80 and 38,844.31 is: 58,271.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,911.08 : 100,375.80 = 38,844.31 : x
  2. Step 2: Convert to fraction form
    66,911.08/100,375.80 = 38,844.31/x
  3. Step 3: Cross multiply
    66,911.08x = 100,375.80 × 38,844.31
  4. Step 4: Simplify right side
    66,911.08x = 3,899,028,691.70
  5. Step 5: Solve for x
    x = 3,899,028,691.70/66,911.08
  6. Step 6: Final answer
    x = 58,271.79

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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.