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Finding the Fourth Proportional to 100,831,405.80, 150,995,166.30 and 80,676,013.80

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Solution

The fourth proportional to 100,831,405.80, 150,995,166.30 and 80,676,013.80 is: 120,812,439.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,831,405.80 : 150,995,166.30 = 80,676,013.80 : x
  2. Step 2: Convert to fraction form
    100,831,405.80/150,995,166.30 = 80,676,013.80/x
  3. Step 3: Cross multiply
    100,831,405.80x = 150,995,166.30 × 80,676,013.80
  4. Step 4: Simplify right side
    100,831,405.80x = 12,181,688,120,152,096
  5. Step 5: Solve for x
    x = 12,181,688,120,152,096/100,831,405.80
  6. Step 6: Final answer
    x = 120,812,439.57

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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.