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Finding the Fourth Proportional to 54,768.65, 81,992.81 and 49,515.80

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Solution

The fourth proportional to 54,768.65, 81,992.81 and 49,515.80 is: 74,128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,768.65 : 81,992.81 = 49,515.80 : x
  2. Step 2: Convert to fraction form
    54,768.65/81,992.81 = 49,515.80/x
  3. Step 3: Cross multiply
    54,768.65x = 81,992.81 × 49,515.80
  4. Step 4: Simplify right side
    54,768.65x = 4,059,938,923.85
  5. Step 5: Solve for x
    x = 4,059,938,923.85/54,768.65
  6. Step 6: Final answer
    x = 74,128.89

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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.