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Finding the Fourth Proportional to 203,975.70, 305,844.75 and 79,170.90

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Solution

The fourth proportional to 203,975.70, 305,844.75 and 79,170.90 is: 118,710.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,975.70 : 305,844.75 = 79,170.90 : x
  2. Step 2: Convert to fraction form
    203,975.70/305,844.75 = 79,170.90/x
  3. Step 3: Cross multiply
    203,975.70x = 305,844.75 × 79,170.90
  4. Step 4: Simplify right side
    203,975.70x = 24,214,004,117.78
  5. Step 5: Solve for x
    x = 24,214,004,117.78/203,975.70
  6. Step 6: Final answer
    x = 118,710.24

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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.