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Finding the Fourth Proportional to 378,128.94, 567,281.66 and 125,390.94

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Solution

The fourth proportional to 378,128.94, 567,281.66 and 125,390.94 is: 188,115.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,128.94 : 567,281.66 = 125,390.94 : x
  2. Step 2: Convert to fraction form
    378,128.94/567,281.66 = 125,390.94/x
  3. Step 3: Cross multiply
    378,128.94x = 567,281.66 × 125,390.94
  4. Step 4: Simplify right side
    378,128.94x = 71,131,977,837.90
  5. Step 5: Solve for x
    x = 71,131,977,837.90/378,128.94
  6. Step 6: Final answer
    x = 188,115.67

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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.