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Finding the Fourth Proportional to 68,958.53, 103,443.78 and 19,038.65

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Solution

The fourth proportional to 68,958.53, 103,443.78 and 19,038.65 is: 28,559.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,958.53 : 103,443.78 = 19,038.65 : x
  2. Step 2: Convert to fraction form
    68,958.53/103,443.78 = 19,038.65/x
  3. Step 3: Cross multiply
    68,958.53x = 103,443.78 × 19,038.65
  4. Step 4: Simplify right side
    68,958.53x = 1,969,429,922.10
  5. Step 5: Solve for x
    x = 1,969,429,922.10/68,958.53
  6. Step 6: Final answer
    x = 28,559.63

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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.