Home / 391,413,891.20-587,120,836.80-118,784,220.80

Finding the Fourth Proportional to 391,413,891.20, 587,120,836.80 and 118,784,220.80

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Solution

The fourth proportional to 391,413,891.20, 587,120,836.80 and 118,784,220.80 is: 178,176,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,413,891.20 : 587,120,836.80 = 118,784,220.80 : x
  2. Step 2: Convert to fraction form
    391,413,891.20/587,120,836.80 = 118,784,220.80/x
  3. Step 3: Cross multiply
    391,413,891.20x = 587,120,836.80 × 118,784,220.80
  4. Step 4: Simplify right side
    391,413,891.20x = 69,740,691,114,731,960
  5. Step 5: Solve for x
    x = 69,740,691,114,731,960/391,413,891.20
  6. Step 6: Final answer
    x = 178,176,331.20

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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.