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Finding the Fourth Proportional to 122,698.62, 184,020.57 and 47,820.78

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Solution

The fourth proportional to 122,698.62, 184,020.57 and 47,820.78 is: 71,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,698.62 : 184,020.57 = 47,820.78 : x
  2. Step 2: Convert to fraction form
    122,698.62/184,020.57 = 47,820.78/x
  3. Step 3: Cross multiply
    122,698.62x = 184,020.57 × 47,820.78
  4. Step 4: Simplify right side
    122,698.62x = 8,800,007,193.44
  5. Step 5: Solve for x
    x = 8,800,007,193.44/122,698.62
  6. Step 6: Final answer
    x = 71,720.51

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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.