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Finding the Fourth Proportional to 84,111.96, 126,183.06 and 28,695

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Solution

The fourth proportional to 84,111.96, 126,183.06 and 28,695 is: 43,047.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,111.96 : 126,183.06 = 28,695 : x
  2. Step 2: Convert to fraction form
    84,111.96/126,183.06 = 28,695/x
  3. Step 3: Cross multiply
    84,111.96x = 126,183.06 × 28,695
  4. Step 4: Simplify right side
    84,111.96x = 3,620,822,906.70
  5. Step 5: Solve for x
    x = 3,620,822,906.70/84,111.96
  6. Step 6: Final answer
    x = 43,047.66

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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.