Home / 258,729.41-388,143.45-90,297.85

Finding the Fourth Proportional to 258,729.41, 388,143.45 and 90,297.85

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Solution

The fourth proportional to 258,729.41, 388,143.45 and 90,297.85 is: 135,463.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,729.41 : 388,143.45 = 90,297.85 : x
  2. Step 2: Convert to fraction form
    258,729.41/388,143.45 = 90,297.85/x
  3. Step 3: Cross multiply
    258,729.41x = 388,143.45 × 90,297.85
  4. Step 4: Simplify right side
    258,729.41x = 35,048,519,026.58
  5. Step 5: Solve for x
    x = 35,048,519,026.58/258,729.41
  6. Step 6: Final answer
    x = 135,463.99

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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.