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Finding the Fourth Proportional to 219,369.75, 329,054.67 and 79,128.36

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Solution

The fourth proportional to 219,369.75, 329,054.67 and 79,128.36 is: 118,692.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,369.75 : 329,054.67 = 79,128.36 : x
  2. Step 2: Convert to fraction form
    219,369.75/329,054.67 = 79,128.36/x
  3. Step 3: Cross multiply
    219,369.75x = 329,054.67 × 79,128.36
  4. Step 4: Simplify right side
    219,369.75x = 26,037,556,387.44
  5. Step 5: Solve for x
    x = 26,037,556,387.44/219,369.75
  6. Step 6: Final answer
    x = 118,692.56

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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.