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Finding the Fourth Proportional to 321,939.31, 482,613.31 and 111,430.03

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Solution

The fourth proportional to 321,939.31, 482,613.31 and 111,430.03 is: 167,042.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,939.31 : 482,613.31 = 111,430.03 : x
  2. Step 2: Convert to fraction form
    321,939.31/482,613.31 = 111,430.03/x
  3. Step 3: Cross multiply
    321,939.31x = 482,613.31 × 111,430.03
  4. Step 4: Simplify right side
    321,939.31x = 53,777,615,611.70
  5. Step 5: Solve for x
    x = 53,777,615,611.70/321,939.31
  6. Step 6: Final answer
    x = 167,042.71

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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.