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Finding the Fourth Proportional to 139,029.84, 191,861.19 and 75,367.44

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Solution

The fourth proportional to 139,029.84, 191,861.19 and 75,367.44 is: 104,007.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,029.84 : 191,861.19 = 75,367.44 : x
  2. Step 2: Convert to fraction form
    139,029.84/191,861.19 = 75,367.44/x
  3. Step 3: Cross multiply
    139,029.84x = 191,861.19 × 75,367.44
  4. Step 4: Simplify right side
    139,029.84x = 14,460,086,725.65
  5. Step 5: Solve for x
    x = 14,460,086,725.65/139,029.84
  6. Step 6: Final answer
    x = 104,007.07

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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.