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Finding the Fourth Proportional to 122,287.60, 183,431.40 and 80,734.60

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Solution

The fourth proportional to 122,287.60, 183,431.40 and 80,734.60 is: 121,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,287.60 : 183,431.40 = 80,734.60 : x
  2. Step 2: Convert to fraction form
    122,287.60/183,431.40 = 80,734.60/x
  3. Step 3: Cross multiply
    122,287.60x = 183,431.40 × 80,734.60
  4. Step 4: Simplify right side
    122,287.60x = 14,809,260,706.44
  5. Step 5: Solve for x
    x = 14,809,260,706.44/122,287.60
  6. Step 6: Final answer
    x = 121,101.90

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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.