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Finding the Fourth Proportional to 54,128, 81,181.20 and 19,069.04

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Solution

The fourth proportional to 54,128, 81,181.20 and 19,069.04 is: 28,599.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,128 : 81,181.20 = 19,069.04 : x
  2. Step 2: Convert to fraction form
    54,128/81,181.20 = 19,069.04/x
  3. Step 3: Cross multiply
    54,128x = 81,181.20 × 19,069.04
  4. Step 4: Simplify right side
    54,128x = 1,548,047,550.05
  5. Step 5: Solve for x
    x = 1,548,047,550.05/54,128
  6. Step 6: Final answer
    x = 28,599.76

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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.