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Finding the Fourth Proportional to 139,481.85, 192,482.69 and 75,821.25

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Solution

The fourth proportional to 139,481.85, 192,482.69 and 75,821.25 is: 104,632.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,481.85 : 192,482.69 = 75,821.25 : x
  2. Step 2: Convert to fraction form
    139,481.85/192,482.69 = 75,821.25/x
  3. Step 3: Cross multiply
    139,481.85x = 192,482.69 × 75,821.25
  4. Step 4: Simplify right side
    139,481.85x = 14,594,277,780.06
  5. Step 5: Solve for x
    x = 14,594,277,780.06/139,481.85
  6. Step 6: Final answer
    x = 104,632.09

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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.