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Finding the Fourth Proportional to 103,268.81, 154,890.90 and 28,396.56

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Solution

The fourth proportional to 103,268.81, 154,890.90 and 28,396.56 is: 42,591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,268.81 : 154,890.90 = 28,396.56 : x
  2. Step 2: Convert to fraction form
    103,268.81/154,890.90 = 28,396.56/x
  3. Step 3: Cross multiply
    103,268.81x = 154,890.90 × 28,396.56
  4. Step 4: Simplify right side
    103,268.81x = 4,398,368,735.30
  5. Step 5: Solve for x
    x = 4,398,368,735.30/103,268.81
  6. Step 6: Final answer
    x = 42,591.45

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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.