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Finding the Fourth Proportional to 115,716.87, 173,640.87 and 45,645.39

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Solution

The fourth proportional to 115,716.87, 173,640.87 and 45,645.39 is: 68,493.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,716.87 : 173,640.87 = 45,645.39 : x
  2. Step 2: Convert to fraction form
    115,716.87/173,640.87 = 45,645.39/x
  3. Step 3: Cross multiply
    115,716.87x = 173,640.87 × 45,645.39
  4. Step 4: Simplify right side
    115,716.87x = 7,925,905,231.09
  5. Step 5: Solve for x
    x = 7,925,905,231.09/115,716.87
  6. Step 6: Final answer
    x = 68,493.95

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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.