Home / 143,470.24-197,990.44-78,940.32

Finding the Fourth Proportional to 143,470.24, 197,990.44 and 78,940.32

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Solution

The fourth proportional to 143,470.24, 197,990.44 and 78,940.32 is: 108,938.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,470.24 : 197,990.44 = 78,940.32 : x
  2. Step 2: Convert to fraction form
    143,470.24/197,990.44 = 78,940.32/x
  3. Step 3: Cross multiply
    143,470.24x = 197,990.44 × 78,940.32
  4. Step 4: Simplify right side
    143,470.24x = 15,629,427,750.73
  5. Step 5: Solve for x
    x = 15,629,427,750.73/143,470.24
  6. Step 6: Final answer
    x = 108,938.47

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1.5x scale

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.