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Finding the Fourth Proportional to 85,865.80, 128,847.42 and 33,278.92

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Solution

The fourth proportional to 85,865.80, 128,847.42 and 33,278.92 is: 49,937.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,865.80 : 128,847.42 = 33,278.92 : x
  2. Step 2: Convert to fraction form
    85,865.80/128,847.42 = 33,278.92/x
  3. Step 3: Cross multiply
    85,865.80x = 128,847.42 × 33,278.92
  4. Step 4: Simplify right side
    85,865.80x = 4,287,902,982.39
  5. Step 5: Solve for x
    x = 4,287,902,982.39/85,865.80
  6. Step 6: Final answer
    x = 49,937.26

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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.