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Finding the Fourth Proportional to 68,263.92, 102,387.69 and 28,815.93

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Solution

The fourth proportional to 68,263.92, 102,387.69 and 28,815.93 is: 43,220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,263.92 : 102,387.69 = 28,815.93 : x
  2. Step 2: Convert to fraction form
    68,263.92/102,387.69 = 28,815.93/x
  3. Step 3: Cross multiply
    68,263.92x = 102,387.69 × 28,815.93
  4. Step 4: Simplify right side
    68,263.92x = 2,950,396,507.90
  5. Step 5: Solve for x
    x = 2,950,396,507.90/68,263.92
  6. Step 6: Final answer
    x = 43,220.44

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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.