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Finding the Fourth Proportional to 381,158.44, 571,790.45 and 128,511.25

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Solution

The fourth proportional to 381,158.44, 571,790.45 and 128,511.25 is: 192,784.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,158.44 : 571,790.45 = 128,511.25 : x
  2. Step 2: Convert to fraction form
    381,158.44/571,790.45 = 128,511.25/x
  3. Step 3: Cross multiply
    381,158.44x = 571,790.45 × 128,511.25
  4. Step 4: Simplify right side
    381,158.44x = 73,481,501,966.05
  5. Step 5: Solve for x
    x = 73,481,501,966.05/381,158.44
  6. Step 6: Final answer
    x = 192,784.67

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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.