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Finding the Fourth Proportional to 263,384.76, 395,139.96 and 85,891.98

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Solution

The fourth proportional to 263,384.76, 395,139.96 and 85,891.98 is: 128,858.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,384.76 : 395,139.96 = 85,891.98 : x
  2. Step 2: Convert to fraction form
    263,384.76/395,139.96 = 85,891.98/x
  3. Step 3: Cross multiply
    263,384.76x = 395,139.96 × 85,891.98
  4. Step 4: Simplify right side
    263,384.76x = 33,939,353,541.52
  5. Step 5: Solve for x
    x = 33,939,353,541.52/263,384.76
  6. Step 6: Final answer
    x = 128,858.46

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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.