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Finding the Fourth Proportional to 54,978.64, 82,511.68 and 19,928.32

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Solution

The fourth proportional to 54,978.64, 82,511.68 and 19,928.32 is: 29,908.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,978.64 : 82,511.68 = 19,928.32 : x
  2. Step 2: Convert to fraction form
    54,978.64/82,511.68 = 19,928.32/x
  3. Step 3: Cross multiply
    54,978.64x = 82,511.68 × 19,928.32
  4. Step 4: Simplify right side
    54,978.64x = 1,644,319,162.78
  5. Step 5: Solve for x
    x = 1,644,319,162.78/54,978.64
  6. Step 6: Final answer
    x = 29,908.33

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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.