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Finding the Fourth Proportional to 68,628.94, 102,858.63 and 40,520.50

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Solution

The fourth proportional to 68,628.94, 102,858.63 and 40,520.50 is: 60,730.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,628.94 : 102,858.63 = 40,520.50 : x
  2. Step 2: Convert to fraction form
    68,628.94/102,858.63 = 40,520.50/x
  3. Step 3: Cross multiply
    68,628.94x = 102,858.63 × 40,520.50
  4. Step 4: Simplify right side
    68,628.94x = 4,167,883,116.92
  5. Step 5: Solve for x
    x = 4,167,883,116.92/68,628.94
  6. Step 6: Final answer
    x = 60,730.69

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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.