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Finding the Fourth Proportional to 263,359.50, 395,043.93 and 85,865.82

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Solution

The fourth proportional to 263,359.50, 395,043.93 and 85,865.82 is: 128,800.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,359.50 : 395,043.93 = 85,865.82 : x
  2. Step 2: Convert to fraction form
    263,359.50/395,043.93 = 85,865.82/x
  3. Step 3: Cross multiply
    263,359.50x = 395,043.93 × 85,865.82
  4. Step 4: Simplify right side
    263,359.50x = 33,920,770,985.47
  5. Step 5: Solve for x
    x = 33,920,770,985.47/263,359.50
  6. Step 6: Final answer
    x = 128,800.26

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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.