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Finding the Fourth Proportional to 68,043.96, 102,054.42 and 20,647.62

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Solution

The fourth proportional to 68,043.96, 102,054.42 and 20,647.62 is: 30,967.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,043.96 : 102,054.42 = 20,647.62 : x
  2. Step 2: Convert to fraction form
    68,043.96/102,054.42 = 20,647.62/x
  3. Step 3: Cross multiply
    68,043.96x = 102,054.42 × 20,647.62
  4. Step 4: Simplify right side
    68,043.96x = 2,107,180,883.48
  5. Step 5: Solve for x
    x = 2,107,180,883.48/68,043.96
  6. Step 6: Final answer
    x = 30,967.93

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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.