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Finding the Fourth Proportional to 54,328.92, 81,504.31 and 19,271.31

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Solution

The fourth proportional to 54,328.92, 81,504.31 and 19,271.31 is: 28,910.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,328.92 : 81,504.31 = 19,271.31 : x
  2. Step 2: Convert to fraction form
    54,328.92/81,504.31 = 19,271.31/x
  3. Step 3: Cross multiply
    54,328.92x = 81,504.31 × 19,271.31
  4. Step 4: Simplify right side
    54,328.92x = 1,570,694,824.35
  5. Step 5: Solve for x
    x = 1,570,694,824.35/54,328.92
  6. Step 6: Final answer
    x = 28,910.84

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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.