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Finding the Fourth Proportional to 140,920,990.80, 211,381,486.20 and 80,454,814.80

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Solution

The fourth proportional to 140,920,990.80, 211,381,486.20 and 80,454,814.80 is: 120,682,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,920,990.80 : 211,381,486.20 = 80,454,814.80 : x
  2. Step 2: Convert to fraction form
    140,920,990.80/211,381,486.20 = 80,454,814.80/x
  3. Step 3: Cross multiply
    140,920,990.80x = 211,381,486.20 × 80,454,814.80
  4. Step 4: Simplify right side
    140,920,990.80x = 17,006,658,324,369,754
  5. Step 5: Solve for x
    x = 17,006,658,324,369,754/140,920,990.80
  6. Step 6: Final answer
    x = 120,682,222.20

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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.