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Finding the Fourth Proportional to 54,491.74, 81,735.39 and 18,961.19

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Solution

The fourth proportional to 54,491.74, 81,735.39 and 18,961.19 is: 28,441.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,491.74 : 81,735.39 = 18,961.19 : x
  2. Step 2: Convert to fraction form
    54,491.74/81,735.39 = 18,961.19/x
  3. Step 3: Cross multiply
    54,491.74x = 81,735.39 × 18,961.19
  4. Step 4: Simplify right side
    54,491.74x = 1,549,800,259.51
  5. Step 5: Solve for x
    x = 1,549,800,259.51/54,491.74
  6. Step 6: Final answer
    x = 28,441.01

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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.