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Finding the Fourth Proportional to 197,790, 296,722.20 and 79,470.80

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Solution

The fourth proportional to 197,790, 296,722.20 and 79,470.80 is: 119,221.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,790 : 296,722.20 = 79,470.80 : x
  2. Step 2: Convert to fraction form
    197,790/296,722.20 = 79,470.80/x
  3. Step 3: Cross multiply
    197,790x = 296,722.20 × 79,470.80
  4. Step 4: Simplify right side
    197,790x = 23,580,750,611.76
  5. Step 5: Solve for x
    x = 23,580,750,611.76/197,790
  6. Step 6: Final answer
    x = 119,221.15

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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.