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Finding the Fourth Proportional to 71,991.05, 108,007.29 and 22,078.51

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Solution

The fourth proportional to 71,991.05, 108,007.29 and 22,078.51 is: 33,124.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.05 : 108,007.29 = 22,078.51 : x
  2. Step 2: Convert to fraction form
    71,991.05/108,007.29 = 22,078.51/x
  3. Step 3: Cross multiply
    71,991.05x = 108,007.29 × 22,078.51
  4. Step 4: Simplify right side
    71,991.05x = 2,384,639,762.32
  5. Step 5: Solve for x
    x = 2,384,639,762.32/71,991.05
  6. Step 6: Final answer
    x = 33,124.12

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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.