Home / 258,834.75-388,345.55-90,379.90

Finding the Fourth Proportional to 258,834.75, 388,345.55 and 90,379.90

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Solution

The fourth proportional to 258,834.75, 388,345.55 and 90,379.90 is: 135,602.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,834.75 : 388,345.55 = 90,379.90 : x
  2. Step 2: Convert to fraction form
    258,834.75/388,345.55 = 90,379.90/x
  3. Step 3: Cross multiply
    258,834.75x = 388,345.55 × 90,379.90
  4. Step 4: Simplify right side
    258,834.75x = 35,098,631,974.45
  5. Step 5: Solve for x
    x = 35,098,631,974.45/258,834.75
  6. Step 6: Final answer
    x = 135,602.47

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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.