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Finding the Fourth Proportional to 267,992.85, 401,709.56 and 90,438.69

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Solution

The fourth proportional to 267,992.85, 401,709.56 and 90,438.69 is: 135,563.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,992.85 : 401,709.56 = 90,438.69 : x
  2. Step 2: Convert to fraction form
    267,992.85/401,709.56 = 90,438.69/x
  3. Step 3: Cross multiply
    267,992.85x = 401,709.56 × 90,438.69
  4. Step 4: Simplify right side
    267,992.85x = 36,330,085,914.68
  5. Step 5: Solve for x
    x = 36,330,085,914.68/267,992.85
  6. Step 6: Final answer
    x = 135,563.64

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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.