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Finding the Fourth Proportional to 321,131.79, 443,142.70 and 177,881.47

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Solution

The fourth proportional to 321,131.79, 443,142.70 and 177,881.47 is: 245,465.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,131.79 : 443,142.70 = 177,881.47 : x
  2. Step 2: Convert to fraction form
    321,131.79/443,142.70 = 177,881.47/x
  3. Step 3: Cross multiply
    321,131.79x = 443,142.70 × 177,881.47
  4. Step 4: Simplify right side
    321,131.79x = 78,826,873,343.21
  5. Step 5: Solve for x
    x = 78,826,873,343.21/321,131.79
  6. Step 6: Final answer
    x = 245,465.80

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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.