Home / 258,740,939.20-388,016,930.40-86,223,380.80

Finding the Fourth Proportional to 258,740,939.20, 388,016,930.40 and 86,223,380.80

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Solution

The fourth proportional to 258,740,939.20, 388,016,930.40 and 86,223,380.80 is: 129,303,587.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,740,939.20 : 388,016,930.40 = 86,223,380.80 : x
  2. Step 2: Convert to fraction form
    258,740,939.20/388,016,930.40 = 86,223,380.80/x
  3. Step 3: Cross multiply
    258,740,939.20x = 388,016,930.40 × 86,223,380.80
  4. Step 4: Simplify right side
    258,740,939.20x = 33,456,131,546,726,292
  5. Step 5: Solve for x
    x = 33,456,131,546,726,292/258,740,939.20
  6. Step 6: Final answer
    x = 129,303,587.02

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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.