Home / 115,745.09-159,782.82-87,075.69

Finding the Fourth Proportional to 115,745.09, 159,782.82 and 87,075.69

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Solution

The fourth proportional to 115,745.09, 159,782.82 and 87,075.69 is: 120,205.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,745.09 : 159,782.82 = 87,075.69 : x
  2. Step 2: Convert to fraction form
    115,745.09/159,782.82 = 87,075.69/x
  3. Step 3: Cross multiply
    115,745.09x = 159,782.82 × 87,075.69
  4. Step 4: Simplify right side
    115,745.09x = 13,913,198,375.93
  5. Step 5: Solve for x
    x = 13,913,198,375.93/115,745.09
  6. Step 6: Final answer
    x = 120,205.52

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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.