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Finding the Fourth Proportional to 321,121.98, 443,117.79 and 177,878.94

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Solution

The fourth proportional to 321,121.98, 443,117.79 and 177,878.94 is: 245,456.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,121.98 : 443,117.79 = 177,878.94 : x
  2. Step 2: Convert to fraction form
    321,121.98/443,117.79 = 177,878.94/x
  3. Step 3: Cross multiply
    321,121.98x = 443,117.79 × 177,878.94
  4. Step 4: Simplify right side
    321,121.98x = 78,821,322,780.34
  5. Step 5: Solve for x
    x = 78,821,322,780.34/321,121.98
  6. Step 6: Final answer
    x = 245,456.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.