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Finding the Fourth Proportional to 78,183.54, 117,273.66 and 19,019.52

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Solution

The fourth proportional to 78,183.54, 117,273.66 and 19,019.52 is: 28,528.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,183.54 : 117,273.66 = 19,019.52 : x
  2. Step 2: Convert to fraction form
    78,183.54/117,273.66 = 19,019.52/x
  3. Step 3: Cross multiply
    78,183.54x = 117,273.66 × 19,019.52
  4. Step 4: Simplify right side
    78,183.54x = 2,230,488,721.84
  5. Step 5: Solve for x
    x = 2,230,488,721.84/78,183.54
  6. Step 6: Final answer
    x = 28,528.88

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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.