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Finding the Fourth Proportional to 74,181.72, 111,290.82 and 21,591.66

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Solution

The fourth proportional to 74,181.72, 111,290.82 and 21,591.66 is: 32,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,181.72 : 111,290.82 = 21,591.66 : x
  2. Step 2: Convert to fraction form
    74,181.72/111,290.82 = 21,591.66/x
  3. Step 3: Cross multiply
    74,181.72x = 111,290.82 × 21,591.66
  4. Step 4: Simplify right side
    74,181.72x = 2,402,953,546.56
  5. Step 5: Solve for x
    x = 2,402,953,546.56/74,181.72
  6. Step 6: Final answer
    x = 32,392.80

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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.