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Finding the Fourth Proportional to 122,694.60, 184,041.90 and 85,369.80

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Solution

The fourth proportional to 122,694.60, 184,041.90 and 85,369.80 is: 128,054.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,694.60 : 184,041.90 = 85,369.80 : x
  2. Step 2: Convert to fraction form
    122,694.60/184,041.90 = 85,369.80/x
  3. Step 3: Cross multiply
    122,694.60x = 184,041.90 × 85,369.80
  4. Step 4: Simplify right side
    122,694.60x = 15,711,620,194.62
  5. Step 5: Solve for x
    x = 15,711,620,194.62/122,694.60
  6. Step 6: Final answer
    x = 128,054.70

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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.