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Finding the Fourth Proportional to 140,920,993.30, 211,381,489.95 and 80,454,817.30

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Solution

The fourth proportional to 140,920,993.30, 211,381,489.95 and 80,454,817.30 is: 120,682,225.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,920,993.30 : 211,381,489.95 = 80,454,817.30 : x
  2. Step 2: Convert to fraction form
    140,920,993.30/211,381,489.95 = 80,454,817.30/x
  3. Step 3: Cross multiply
    140,920,993.30x = 211,381,489.95 × 80,454,817.30
  4. Step 4: Simplify right side
    140,920,993.30x = 17,006,659,154,529,034
  5. Step 5: Solve for x
    x = 17,006,659,154,529,034/140,920,993.30
  6. Step 6: Final answer
    x = 120,682,225.95

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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.