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Finding the Fourth Proportional to 207,961.70, 311,942.55 and 172,969.70

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Solution

The fourth proportional to 207,961.70, 311,942.55 and 172,969.70 is: 259,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,961.70 : 311,942.55 = 172,969.70 : x
  2. Step 2: Convert to fraction form
    207,961.70/311,942.55 = 172,969.70/x
  3. Step 3: Cross multiply
    207,961.70x = 311,942.55 × 172,969.70
  4. Step 4: Simplify right side
    207,961.70x = 53,956,609,290.74
  5. Step 5: Solve for x
    x = 53,956,609,290.74/207,961.70
  6. Step 6: Final answer
    x = 259,454.55

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1.5x scale

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.