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Finding the Fourth Proportional to 139,908.45, 193,138.49 and 82,528.46

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Solution

The fourth proportional to 139,908.45, 193,138.49 and 82,528.46 is: 113,927.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,908.45 : 193,138.49 = 82,528.46 : x
  2. Step 2: Convert to fraction form
    139,908.45/193,138.49 = 82,528.46/x
  3. Step 3: Cross multiply
    139,908.45x = 193,138.49 × 82,528.46
  4. Step 4: Simplify right side
    139,908.45x = 15,939,422,146.43
  5. Step 5: Solve for x
    x = 15,939,422,146.43/139,908.45
  6. Step 6: Final answer
    x = 113,927.52

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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.