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Finding the Fourth Proportional to 103,806.54, 155,709.91 and 28,926.90

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Solution

The fourth proportional to 103,806.54, 155,709.91 and 28,926.90 is: 43,390.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,806.54 : 155,709.91 = 28,926.90 : x
  2. Step 2: Convert to fraction form
    103,806.54/155,709.91 = 28,926.90/x
  3. Step 3: Cross multiply
    103,806.54x = 155,709.91 × 28,926.90
  4. Step 4: Simplify right side
    103,806.54x = 4,504,204,995.58
  5. Step 5: Solve for x
    x = 4,504,204,995.58/103,806.54
  6. Step 6: Final answer
    x = 43,390.38

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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.