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Finding the Fourth Proportional to 85,469.15, 128,203.81 and 22,289.21

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Solution

The fourth proportional to 85,469.15, 128,203.81 and 22,289.21 is: 33,433.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,469.15 : 128,203.81 = 22,289.21 : x
  2. Step 2: Convert to fraction form
    85,469.15/128,203.81 = 22,289.21/x
  3. Step 3: Cross multiply
    85,469.15x = 128,203.81 × 22,289.21
  4. Step 4: Simplify right side
    85,469.15x = 2,857,561,908.68
  5. Step 5: Solve for x
    x = 2,857,561,908.68/85,469.15
  6. Step 6: Final answer
    x = 33,433.84

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1.5x scale

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.