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Finding the Fourth Proportional to 139,725.27, 209,573.33 and 39,879

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Solution

The fourth proportional to 139,725.27, 209,573.33 and 39,879 is: 59,814.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,725.27 : 209,573.33 = 39,879 : x
  2. Step 2: Convert to fraction form
    139,725.27/209,573.33 = 39,879/x
  3. Step 3: Cross multiply
    139,725.27x = 209,573.33 × 39,879
  4. Step 4: Simplify right side
    139,725.27x = 8,357,574,627.68
  5. Step 5: Solve for x
    x = 8,357,574,627.68/139,725.27
  6. Step 6: Final answer
    x = 59,814.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.