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Finding the Fourth Proportional to 103,661.44, 155,474.81 and 28,789.15

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Solution

The fourth proportional to 103,661.44, 155,474.81 and 28,789.15 is: 43,178.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.44 : 155,474.81 = 28,789.15 : x
  2. Step 2: Convert to fraction form
    103,661.44/155,474.81 = 28,789.15/x
  3. Step 3: Cross multiply
    103,661.44x = 155,474.81 × 28,789.15
  4. Step 4: Simplify right side
    103,661.44x = 4,475,987,626.31
  5. Step 5: Solve for x
    x = 4,475,987,626.31/103,661.44
  6. Step 6: Final answer
    x = 43,178.91

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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.