Home / 279,631,855.38-419,432,565.86-85,543,270.68

Finding the Fourth Proportional to 279,631,855.38, 419,432,565.86 and 85,543,270.68

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Solution

The fourth proportional to 279,631,855.38, 419,432,565.86 and 85,543,270.68 is: 128,310,250.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,631,855.38 : 419,432,565.86 = 85,543,270.68 : x
  2. Step 2: Convert to fraction form
    279,631,855.38/419,432,565.86 = 85,543,270.68/x
  3. Step 3: Cross multiply
    279,631,855.38x = 419,432,565.86 × 85,543,270.68
  4. Step 4: Simplify right side
    279,631,855.38x = 35,879,633,513,368,912
  5. Step 5: Solve for x
    x = 35,879,633,513,368,912/279,631,855.38
  6. Step 6: Final answer
    x = 128,310,250.86

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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.