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Finding the Fourth Proportional to 140,920,985.80, 211,381,478.70 and 80,454,809.80

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Solution

The fourth proportional to 140,920,985.80, 211,381,478.70 and 80,454,809.80 is: 120,682,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,920,985.80 : 211,381,478.70 = 80,454,809.80 : x
  2. Step 2: Convert to fraction form
    140,920,985.80/211,381,478.70 = 80,454,809.80/x
  3. Step 3: Cross multiply
    140,920,985.80x = 211,381,478.70 × 80,454,809.80
  4. Step 4: Simplify right side
    140,920,985.80x = 17,006,656,664,051,250
  5. Step 5: Solve for x
    x = 17,006,656,664,051,250/140,920,985.80
  6. Step 6: Final answer
    x = 120,682,214.70

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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.