Home / 258,986.09-388,442.22-81,488.48

Finding the Fourth Proportional to 258,986.09, 388,442.22 and 81,488.48

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Solution

The fourth proportional to 258,986.09, 388,442.22 and 81,488.48 is: 122,221.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,986.09 : 388,442.22 = 81,488.48 : x
  2. Step 2: Convert to fraction form
    258,986.09/388,442.22 = 81,488.48/x
  3. Step 3: Cross multiply
    258,986.09x = 388,442.22 × 81,488.48
  4. Step 4: Simplify right side
    258,986.09x = 31,653,566,075.63
  5. Step 5: Solve for x
    x = 31,653,566,075.63/258,986.09
  6. Step 6: Final answer
    x = 122,221.11

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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.