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Finding the Fourth Proportional to 85,873.80, 128,859.42 and 33,286.92

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Solution

The fourth proportional to 85,873.80, 128,859.42 and 33,286.92 is: 49,949.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,873.80 : 128,859.42 = 33,286.92 : x
  2. Step 2: Convert to fraction form
    85,873.80/128,859.42 = 33,286.92/x
  3. Step 3: Cross multiply
    85,873.80x = 128,859.42 × 33,286.92
  4. Step 4: Simplify right side
    85,873.80x = 4,289,333,204.79
  5. Step 5: Solve for x
    x = 4,289,333,204.79/85,873.80
  6. Step 6: Final answer
    x = 49,949.27

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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.