Home / 82,075.15-123,112.76-19,745.65

Finding the Fourth Proportional to 82,075.15, 123,112.76 and 19,745.65

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Solution

The fourth proportional to 82,075.15, 123,112.76 and 19,745.65 is: 29,618.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,075.15 : 123,112.76 = 19,745.65 : x
  2. Step 2: Convert to fraction form
    82,075.15/123,112.76 = 19,745.65/x
  3. Step 3: Cross multiply
    82,075.15x = 123,112.76 × 19,745.65
  4. Step 4: Simplify right side
    82,075.15x = 2,430,941,289.47
  5. Step 5: Solve for x
    x = 2,430,941,289.47/82,075.15
  6. Step 6: Final answer
    x = 29,618.48

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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.