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Finding the Fourth Proportional to 54,388.70, 81,583.04 and 19,329.74

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Solution

The fourth proportional to 54,388.70, 81,583.04 and 19,329.74 is: 28,994.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,388.70 : 81,583.04 = 19,329.74 : x
  2. Step 2: Convert to fraction form
    54,388.70/81,583.04 = 19,329.74/x
  3. Step 3: Cross multiply
    54,388.70x = 81,583.04 × 19,329.74
  4. Step 4: Simplify right side
    54,388.70x = 1,576,978,447.05
  5. Step 5: Solve for x
    x = 1,576,978,447.05/54,388.70
  6. Step 6: Final answer
    x = 28,994.60

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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.