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Finding the Fourth Proportional to 188,012.61, 281,846.25 and 81,329.94

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Solution

The fourth proportional to 188,012.61, 281,846.25 and 81,329.94 is: 121,920.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,012.61 : 281,846.25 = 81,329.94 : x
  2. Step 2: Convert to fraction form
    188,012.61/281,846.25 = 81,329.94/x
  3. Step 3: Cross multiply
    188,012.61x = 281,846.25 × 81,329.94
  4. Step 4: Simplify right side
    188,012.61x = 22,922,538,601.73
  5. Step 5: Solve for x
    x = 22,922,538,601.73/188,012.61
  6. Step 6: Final answer
    x = 121,920.22

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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.