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Finding the Fourth Proportional to 67,991.98, 102,006.42 and 20,605.16

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Solution

The fourth proportional to 67,991.98, 102,006.42 and 20,605.16 is: 30,913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,991.98 : 102,006.42 = 20,605.16 : x
  2. Step 2: Convert to fraction form
    67,991.98/102,006.42 = 20,605.16/x
  3. Step 3: Cross multiply
    67,991.98x = 102,006.42 × 20,605.16
  4. Step 4: Simplify right side
    67,991.98x = 2,101,858,324.99
  5. Step 5: Solve for x
    x = 2,101,858,324.99/67,991.98
  6. Step 6: Final answer
    x = 30,913.33

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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.