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Finding the Fourth Proportional to 262,172.70, 393,175.67 and 84,638.43

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Solution

The fourth proportional to 262,172.70, 393,175.67 and 84,638.43 is: 126,930.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,172.70 : 393,175.67 = 84,638.43 : x
  2. Step 2: Convert to fraction form
    262,172.70/393,175.67 = 84,638.43/x
  3. Step 3: Cross multiply
    262,172.70x = 393,175.67 × 84,638.43
  4. Step 4: Simplify right side
    262,172.70x = 33,277,770,999.81
  5. Step 5: Solve for x
    x = 33,277,770,999.81/262,172.70
  6. Step 6: Final answer
    x = 126,930.73

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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.