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Finding the Fourth Proportional to 85,872.80, 128,857.92 and 33,285.92

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Solution

The fourth proportional to 85,872.80, 128,857.92 and 33,285.92 is: 49,947.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,872.80 : 128,857.92 = 33,285.92 : x
  2. Step 2: Convert to fraction form
    85,872.80/128,857.92 = 33,285.92/x
  3. Step 3: Cross multiply
    85,872.80x = 128,857.92 × 33,285.92
  4. Step 4: Simplify right side
    85,872.80x = 4,289,154,416.49
  5. Step 5: Solve for x
    x = 4,289,154,416.49/85,872.80
  6. Step 6: Final answer
    x = 49,947.76

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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.