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Finding the Fourth Proportional to 139,787.84, 192,903.68 and 80,168

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Solution

The fourth proportional to 139,787.84, 192,903.68 and 80,168 is: 110,629.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,787.84 : 192,903.68 = 80,168 : x
  2. Step 2: Convert to fraction form
    139,787.84/192,903.68 = 80,168/x
  3. Step 3: Cross multiply
    139,787.84x = 192,903.68 × 80,168
  4. Step 4: Simplify right side
    139,787.84x = 15,464,702,218.24
  5. Step 5: Solve for x
    x = 15,464,702,218.24/139,787.84
  6. Step 6: Final answer
    x = 110,629.81

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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.