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Finding the Fourth Proportional to 168,930.63, 253,220.99 and 139,034.34

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Solution

The fourth proportional to 168,930.63, 253,220.99 and 139,034.34 is: 208,407.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,930.63 : 253,220.99 = 139,034.34 : x
  2. Step 2: Convert to fraction form
    168,930.63/253,220.99 = 139,034.34/x
  3. Step 3: Cross multiply
    168,930.63x = 253,220.99 × 139,034.34
  4. Step 4: Simplify right side
    168,930.63x = 35,206,412,523.62
  5. Step 5: Solve for x
    x = 35,206,412,523.62/168,930.63
  6. Step 6: Final answer
    x = 208,407.51

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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.