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Finding the Fourth Proportional to 207,690.15, 311,590.60 and 74,571.56

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Solution

The fourth proportional to 207,690.15, 311,590.60 and 74,571.56 is: 111,877.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,690.15 : 311,590.60 = 74,571.56 : x
  2. Step 2: Convert to fraction form
    207,690.15/311,590.60 = 74,571.56/x
  3. Step 3: Cross multiply
    207,690.15x = 311,590.60 × 74,571.56
  4. Step 4: Simplify right side
    207,690.15x = 23,235,796,920.28
  5. Step 5: Solve for x
    x = 23,235,796,920.28/207,690.15
  6. Step 6: Final answer
    x = 111,877.22

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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.