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Finding the Fourth Proportional to 128,580.87, 192,855.93 and 33,818.43

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Solution

The fourth proportional to 128,580.87, 192,855.93 and 33,818.43 is: 50,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,580.87 : 192,855.93 = 33,818.43 : x
  2. Step 2: Convert to fraction form
    128,580.87/192,855.93 = 33,818.43/x
  3. Step 3: Cross multiply
    128,580.87x = 192,855.93 × 33,818.43
  4. Step 4: Simplify right side
    128,580.87x = 6,522,084,768.79
  5. Step 5: Solve for x
    x = 6,522,084,768.79/128,580.87
  6. Step 6: Final answer
    x = 50,723.60

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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.