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Finding the Fourth Proportional to 81,491.38, 122,212.22 and 56,352.51

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Solution

The fourth proportional to 81,491.38, 122,212.22 and 56,352.51 is: 84,511.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,491.38 : 122,212.22 = 56,352.51 : x
  2. Step 2: Convert to fraction form
    81,491.38/122,212.22 = 56,352.51/x
  3. Step 3: Cross multiply
    81,491.38x = 122,212.22 × 56,352.51
  4. Step 4: Simplify right side
    81,491.38x = 6,886,965,067.91
  5. Step 5: Solve for x
    x = 6,886,965,067.91/81,491.38
  6. Step 6: Final answer
    x = 84,511.58

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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.