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Finding the Fourth Proportional to 254,455.84, 381,789.42 and 128,028.58

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Solution

The fourth proportional to 254,455.84, 381,789.42 and 128,028.58 is: 192,096.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,455.84 : 381,789.42 = 128,028.58 : x
  2. Step 2: Convert to fraction form
    254,455.84/381,789.42 = 128,028.58/x
  3. Step 3: Cross multiply
    254,455.84x = 381,789.42 × 128,028.58
  4. Step 4: Simplify right side
    254,455.84x = 48,879,957,301.62
  5. Step 5: Solve for x
    x = 48,879,957,301.62/254,455.84
  6. Step 6: Final answer
    x = 192,096.03

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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.