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Finding the Fourth Proportional to 68,956.53, 103,440.78 and 19,036.65

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Solution

The fourth proportional to 68,956.53, 103,440.78 and 19,036.65 is: 28,556.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,956.53 : 103,440.78 = 19,036.65 : x
  2. Step 2: Convert to fraction form
    68,956.53/103,440.78 = 19,036.65/x
  3. Step 3: Cross multiply
    68,956.53x = 103,440.78 × 19,036.65
  4. Step 4: Simplify right side
    68,956.53x = 1,969,165,924.59
  5. Step 5: Solve for x
    x = 1,969,165,924.59/68,956.53
  6. Step 6: Final answer
    x = 28,556.63

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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.