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Finding the Fourth Proportional to 122,965.20, 184,620.60 and 76,309.20

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Solution

The fourth proportional to 122,965.20, 184,620.60 and 76,309.20 is: 114,571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,965.20 : 184,620.60 = 76,309.20 : x
  2. Step 2: Convert to fraction form
    122,965.20/184,620.60 = 76,309.20/x
  3. Step 3: Cross multiply
    122,965.20x = 184,620.60 × 76,309.20
  4. Step 4: Simplify right side
    122,965.20x = 14,088,250,289.52
  5. Step 5: Solve for x
    x = 14,088,250,289.52/122,965.20
  6. Step 6: Final answer
    x = 114,571.04

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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.