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Finding the Fourth Proportional to 122,720.80, 184,081.20 and 100,559.20

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Solution

The fourth proportional to 122,720.80, 184,081.20 and 100,559.20 is: 150,838.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,720.80 : 184,081.20 = 100,559.20 : x
  2. Step 2: Convert to fraction form
    122,720.80/184,081.20 = 100,559.20/x
  3. Step 3: Cross multiply
    122,720.80x = 184,081.20 × 100,559.20
  4. Step 4: Simplify right side
    122,720.80x = 18,511,058,207.04
  5. Step 5: Solve for x
    x = 18,511,058,207.04/122,720.80
  6. Step 6: Final answer
    x = 150,838.80

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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.