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Finding the Fourth Proportional to 122,939.80, 184,409.70 and 109,720.60

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Solution

The fourth proportional to 122,939.80, 184,409.70 and 109,720.60 is: 164,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,939.80 : 184,409.70 = 109,720.60 : x
  2. Step 2: Convert to fraction form
    122,939.80/184,409.70 = 109,720.60/x
  3. Step 3: Cross multiply
    122,939.80x = 184,409.70 × 109,720.60
  4. Step 4: Simplify right side
    122,939.80x = 20,233,542,929.82
  5. Step 5: Solve for x
    x = 20,233,542,929.82/122,939.80
  6. Step 6: Final answer
    x = 164,580.90

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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.