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Finding the Fourth Proportional to 139,229.62, 191,991.64 and 82,630.06

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Solution

The fourth proportional to 139,229.62, 191,991.64 and 82,630.06 is: 113,943.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,229.62 : 191,991.64 = 82,630.06 : x
  2. Step 2: Convert to fraction form
    139,229.62/191,991.64 = 82,630.06/x
  3. Step 3: Cross multiply
    139,229.62x = 191,991.64 × 82,630.06
  4. Step 4: Simplify right side
    139,229.62x = 15,864,280,732.70
  5. Step 5: Solve for x
    x = 15,864,280,732.70/139,229.62
  6. Step 6: Final answer
    x = 113,943.29

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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.