Home / 258,760,128.80-388,028,218.80-105,355,200.80

Finding the Fourth Proportional to 258,760,128.80, 388,028,218.80 and 105,355,200.80

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Solution

The fourth proportional to 258,760,128.80, 388,028,218.80 and 105,355,200.80 is: 157,987,210.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,760,128.80 : 388,028,218.80 = 105,355,200.80 : x
  2. Step 2: Convert to fraction form
    258,760,128.80/388,028,218.80 = 105,355,200.80/x
  3. Step 3: Cross multiply
    258,760,128.80x = 388,028,218.80 × 105,355,200.80
  4. Step 4: Simplify right side
    258,760,128.80x = 40,880,790,907,740,336
  5. Step 5: Solve for x
    x = 40,880,790,907,740,336/258,760,128.80
  6. Step 6: Final answer
    x = 157,987,210.38

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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.