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Finding the Fourth Proportional to 263,390.76, 395,149.02 and 85,897.92

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Solution

The fourth proportional to 263,390.76, 395,149.02 and 85,897.92 is: 128,867.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,390.76 : 395,149.02 = 85,897.92 : x
  2. Step 2: Convert to fraction form
    263,390.76/395,149.02 = 85,897.92/x
  3. Step 3: Cross multiply
    263,390.76x = 395,149.02 × 85,897.92
  4. Step 4: Simplify right side
    263,390.76x = 33,942,478,908.04
  5. Step 5: Solve for x
    x = 33,942,478,908.04/263,390.76
  6. Step 6: Final answer
    x = 128,867.39

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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.