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Finding the Fourth Proportional to 255,891.78, 383,754.51 and 85,067.64

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Solution

The fourth proportional to 255,891.78, 383,754.51 and 85,067.64 is: 127,573.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,891.78 : 383,754.51 = 85,067.64 : x
  2. Step 2: Convert to fraction form
    255,891.78/383,754.51 = 85,067.64/x
  3. Step 3: Cross multiply
    255,891.78x = 383,754.51 × 85,067.64
  4. Step 4: Simplify right side
    255,891.78x = 32,645,090,505.06
  5. Step 5: Solve for x
    x = 32,645,090,505.06/255,891.78
  6. Step 6: Final answer
    x = 127,573.81

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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.