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Finding the Fourth Proportional to 103,471.13, 155,205.13 and 28,589.60

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Solution

The fourth proportional to 103,471.13, 155,205.13 and 28,589.60 is: 42,883.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,471.13 : 155,205.13 = 28,589.60 : x
  2. Step 2: Convert to fraction form
    103,471.13/155,205.13 = 28,589.60/x
  3. Step 3: Cross multiply
    103,471.13x = 155,205.13 × 28,589.60
  4. Step 4: Simplify right side
    103,471.13x = 4,437,252,584.65
  5. Step 5: Solve for x
    x = 4,437,252,584.65/103,471.13
  6. Step 6: Final answer
    x = 42,883.97

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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.