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Finding the Fourth Proportional to 303,375.62, 455,059.78 and 78,716.04

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Solution

The fourth proportional to 303,375.62, 455,059.78 and 78,716.04 is: 118,073.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,375.62 : 455,059.78 = 78,716.04 : x
  2. Step 2: Convert to fraction form
    303,375.62/455,059.78 = 78,716.04/x
  3. Step 3: Cross multiply
    303,375.62x = 455,059.78 × 78,716.04
  4. Step 4: Simplify right side
    303,375.62x = 35,820,503,844.87
  5. Step 5: Solve for x
    x = 35,820,503,844.87/303,375.62
  6. Step 6: Final answer
    x = 118,073.11

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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.