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Finding the Fourth Proportional to 321,674.40, 482,508.60 and 81,788.82

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Solution

The fourth proportional to 321,674.40, 482,508.60 and 81,788.82 is: 122,682.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,674.40 : 482,508.60 = 81,788.82 : x
  2. Step 2: Convert to fraction form
    321,674.40/482,508.60 = 81,788.82/x
  3. Step 3: Cross multiply
    321,674.40x = 482,508.60 × 81,788.82
  4. Step 4: Simplify right side
    321,674.40x = 39,463,809,033.85
  5. Step 5: Solve for x
    x = 39,463,809,033.85/321,674.40
  6. Step 6: Final answer
    x = 122,682.47

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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.