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Finding the Fourth Proportional to 80,879.44, 111,621.80 and 45,075.28

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Solution

The fourth proportional to 80,879.44, 111,621.80 and 45,075.28 is: 62,208.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879.44 : 111,621.80 = 45,075.28 : x
  2. Step 2: Convert to fraction form
    80,879.44/111,621.80 = 45,075.28/x
  3. Step 3: Cross multiply
    80,879.44x = 111,621.80 × 45,075.28
  4. Step 4: Simplify right side
    80,879.44x = 5,031,383,889.10
  5. Step 5: Solve for x
    x = 5,031,383,889.10/80,879.44
  6. Step 6: Final answer
    x = 62,208.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.