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Finding the Fourth Proportional to 412,091.80, 618,137.70 and 145,850.20

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Solution

The fourth proportional to 412,091.80, 618,137.70 and 145,850.20 is: 218,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,091.80 : 618,137.70 = 145,850.20 : x
  2. Step 2: Convert to fraction form
    412,091.80/618,137.70 = 145,850.20/x
  3. Step 3: Cross multiply
    412,091.80x = 618,137.70 × 145,850.20
  4. Step 4: Simplify right side
    412,091.80x = 90,155,507,172.54
  5. Step 5: Solve for x
    x = 90,155,507,172.54/412,091.80
  6. Step 6: Final answer
    x = 218,775.30

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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.