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Finding the Fourth Proportional to 122,908.80, 184,363.20 and 100,747.20

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Solution

The fourth proportional to 122,908.80, 184,363.20 and 100,747.20 is: 151,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,908.80 : 184,363.20 = 100,747.20 : x
  2. Step 2: Convert to fraction form
    122,908.80/184,363.20 = 100,747.20/x
  3. Step 3: Cross multiply
    122,908.80x = 184,363.20 × 100,747.20
  4. Step 4: Simplify right side
    122,908.80x = 18,574,076,183.04
  5. Step 5: Solve for x
    x = 18,574,076,183.04/122,908.80
  6. Step 6: Final answer
    x = 151,120.80

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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.