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Finding the Fourth Proportional to 321,129.07, 443,158.13 and 177,898.39

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Solution

The fourth proportional to 321,129.07, 443,158.13 and 177,898.39 is: 245,499.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,129.07 : 443,158.13 = 177,898.39 : x
  2. Step 2: Convert to fraction form
    321,129.07/443,158.13 = 177,898.39/x
  3. Step 3: Cross multiply
    321,129.07x = 443,158.13 × 177,898.39
  4. Step 4: Simplify right side
    321,129.07x = 78,837,117,842.41
  5. Step 5: Solve for x
    x = 78,837,117,842.41/321,129.07
  6. Step 6: Final answer
    x = 245,499.79

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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.