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Finding the Fourth Proportional to 203,861.70, 305,792.55 and 124,145.55

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Solution

The fourth proportional to 203,861.70, 305,792.55 and 124,145.55 is: 186,218.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,861.70 : 305,792.55 = 124,145.55 : x
  2. Step 2: Convert to fraction form
    203,861.70/305,792.55 = 124,145.55/x
  3. Step 3: Cross multiply
    203,861.70x = 305,792.55 × 124,145.55
  4. Step 4: Simplify right side
    203,861.70x = 37,962,784,305.65
  5. Step 5: Solve for x
    x = 37,962,784,305.65/203,861.70
  6. Step 6: Final answer
    x = 186,218.33

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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.