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Finding the Fourth Proportional to 144,340.53, 199,183.65 and 78,928.15

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Solution

The fourth proportional to 144,340.53, 199,183.65 and 78,928.15 is: 108,917.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,340.53 : 199,183.65 = 78,928.15 : x
  2. Step 2: Convert to fraction form
    144,340.53/199,183.65 = 78,928.15/x
  3. Step 3: Cross multiply
    144,340.53x = 199,183.65 × 78,928.15
  4. Step 4: Simplify right side
    144,340.53x = 15,721,197,004.75
  5. Step 5: Solve for x
    x = 15,721,197,004.75/144,340.53
  6. Step 6: Final answer
    x = 108,917.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.