Home / 391,820,009.20-587,792,221.80-133,059,612.40

Finding the Fourth Proportional to 391,820,009.20, 587,792,221.80 and 133,059,612.40

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Solution

The fourth proportional to 391,820,009.20, 587,792,221.80 and 133,059,612.40 is: 199,610,544.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,820,009.20 : 587,792,221.80 = 133,059,612.40 : x
  2. Step 2: Convert to fraction form
    391,820,009.20/587,792,221.80 = 133,059,612.40/x
  3. Step 3: Cross multiply
    391,820,009.20x = 587,792,221.80 × 133,059,612.40
  4. Step 4: Simplify right side
    391,820,009.20x = 78,211,405,204,442,832
  5. Step 5: Solve for x
    x = 78,211,405,204,442,832/391,820,009.20
  6. Step 6: Final answer
    x = 199,610,544.05

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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.