Home / 66,919.85-100,375.08-31,388.96

Finding the Fourth Proportional to 66,919.85, 100,375.08 and 31,388.96

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Solution

The fourth proportional to 66,919.85, 100,375.08 and 31,388.96 is: 47,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.85 : 100,375.08 = 31,388.96 : x
  2. Step 2: Convert to fraction form
    66,919.85/100,375.08 = 31,388.96/x
  3. Step 3: Cross multiply
    66,919.85x = 100,375.08 × 31,388.96
  4. Step 4: Simplify right side
    66,919.85x = 3,150,669,592.63
  5. Step 5: Solve for x
    x = 3,150,669,592.63/66,919.85
  6. Step 6: Final answer
    x = 47,081.24

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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.