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Finding the Fourth Proportional to 140,961,607.80, 211,442,411.70 and 80,495,431.80

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Solution

The fourth proportional to 140,961,607.80, 211,442,411.70 and 80,495,431.80 is: 120,743,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,961,607.80 : 211,442,411.70 = 80,495,431.80 : x
  2. Step 2: Convert to fraction form
    140,961,607.80/211,442,411.70 = 80,495,431.80/x
  3. Step 3: Cross multiply
    140,961,607.80x = 211,442,411.70 × 80,495,431.80
  4. Step 4: Simplify right side
    140,961,607.80x = 17,020,148,230,624,870
  5. Step 5: Solve for x
    x = 17,020,148,230,624,870/140,961,607.80
  6. Step 6: Final answer
    x = 120,743,147.70

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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.