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Finding the Fourth Proportional to 321,231.68, 481,803.78 and 84,554.54

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Solution

The fourth proportional to 321,231.68, 481,803.78 and 84,554.54 is: 126,820.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,231.68 : 481,803.78 = 84,554.54 : x
  2. Step 2: Convert to fraction form
    321,231.68/481,803.78 = 84,554.54/x
  3. Step 3: Cross multiply
    321,231.68x = 481,803.78 × 84,554.54
  4. Step 4: Simplify right side
    321,231.68x = 40,738,696,988.16
  5. Step 5: Solve for x
    x = 40,738,696,988.16/321,231.68
  6. Step 6: Final answer
    x = 126,820.30

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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.