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Finding the Fourth Proportional to 66,481.72, 99,741.03 and 36,920.31

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Solution

The fourth proportional to 66,481.72, 99,741.03 and 36,920.31 is: 55,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.72 : 99,741.03 = 36,920.31 : x
  2. Step 2: Convert to fraction form
    66,481.72/99,741.03 = 36,920.31/x
  3. Step 3: Cross multiply
    66,481.72x = 99,741.03 × 36,920.31
  4. Step 4: Simplify right side
    66,481.72x = 3,682,470,003.56
  5. Step 5: Solve for x
    x = 3,682,470,003.56/66,481.72
  6. Step 6: Final answer
    x = 55,390.72

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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.