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Finding the Fourth Proportional to 68,230.76, 102,359.94 and 28,787.96

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Solution

The fourth proportional to 68,230.76, 102,359.94 and 28,787.96 is: 43,187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,230.76 : 102,359.94 = 28,787.96 : x
  2. Step 2: Convert to fraction form
    68,230.76/102,359.94 = 28,787.96/x
  3. Step 3: Cross multiply
    68,230.76x = 102,359.94 × 28,787.96
  4. Step 4: Simplify right side
    68,230.76x = 2,946,733,858.32
  5. Step 5: Solve for x
    x = 2,946,733,858.32/68,230.76
  6. Step 6: Final answer
    x = 43,187.76

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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.