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Finding the Fourth Proportional to 127,819.80, 191,729.70 and 80,580.60

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Solution

The fourth proportional to 127,819.80, 191,729.70 and 80,580.60 is: 120,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,819.80 : 191,729.70 = 80,580.60 : x
  2. Step 2: Convert to fraction form
    127,819.80/191,729.70 = 80,580.60/x
  3. Step 3: Cross multiply
    127,819.80x = 191,729.70 × 80,580.60
  4. Step 4: Simplify right side
    127,819.80x = 15,449,694,263.82
  5. Step 5: Solve for x
    x = 15,449,694,263.82/127,819.80
  6. Step 6: Final answer
    x = 120,870.90

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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.