Home / 143,274.49-197,709.19-78,742.33

Finding the Fourth Proportional to 143,274.49, 197,709.19 and 78,742.33

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Solution

The fourth proportional to 143,274.49, 197,709.19 and 78,742.33 is: 108,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,274.49 : 197,709.19 = 78,742.33 : x
  2. Step 2: Convert to fraction form
    143,274.49/197,709.19 = 78,742.33/x
  3. Step 3: Cross multiply
    143,274.49x = 197,709.19 × 78,742.33
  4. Step 4: Simplify right side
    143,274.49x = 15,568,081,591.88
  5. Step 5: Solve for x
    x = 15,568,081,591.88/143,274.49
  6. Step 6: Final answer
    x = 108,659.13

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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.