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Finding the Fourth Proportional to 54,409.66, 81,439.53 and 28,078.54

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Solution

The fourth proportional to 54,409.66, 81,439.53 and 28,078.54 is: 42,027.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,409.66 : 81,439.53 = 28,078.54 : x
  2. Step 2: Convert to fraction form
    54,409.66/81,439.53 = 28,078.54/x
  3. Step 3: Cross multiply
    54,409.66x = 81,439.53 × 28,078.54
  4. Step 4: Simplify right side
    54,409.66x = 2,286,703,100.69
  5. Step 5: Solve for x
    x = 2,286,703,100.69/54,409.66
  6. Step 6: Final answer
    x = 42,027.52

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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.