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Finding the Fourth Proportional to 207,530.40, 311,441.40 and 89,286.60

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Solution

The fourth proportional to 207,530.40, 311,441.40 and 89,286.60 is: 133,992.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,530.40 : 311,441.40 = 89,286.60 : x
  2. Step 2: Convert to fraction form
    207,530.40/311,441.40 = 89,286.60/x
  3. Step 3: Cross multiply
    207,530.40x = 311,441.40 × 89,286.60
  4. Step 4: Simplify right side
    207,530.40x = 27,807,543,705.24
  5. Step 5: Solve for x
    x = 27,807,543,705.24/207,530.40
  6. Step 6: Final answer
    x = 133,992.63

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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.