Home / 143,074.54-197,435.82-78,542.20

Finding the Fourth Proportional to 143,074.54, 197,435.82 and 78,542.20

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Solution

The fourth proportional to 143,074.54, 197,435.82 and 78,542.20 is: 108,384.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,074.54 : 197,435.82 = 78,542.20 : x
  2. Step 2: Convert to fraction form
    143,074.54/197,435.82 = 78,542.20/x
  3. Step 3: Cross multiply
    143,074.54x = 197,435.82 × 78,542.20
  4. Step 4: Simplify right side
    143,074.54x = 15,507,043,661.60
  5. Step 5: Solve for x
    x = 15,507,043,661.60/143,074.54
  6. Step 6: Final answer
    x = 108,384.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.