Home / 143,371.72-197,857.95-78,843.60

Finding the Fourth Proportional to 143,371.72, 197,857.95 and 78,843.60

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Solution

The fourth proportional to 143,371.72, 197,857.95 and 78,843.60 is: 108,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,371.72 : 197,857.95 = 78,843.60 : x
  2. Step 2: Convert to fraction form
    143,371.72/197,857.95 = 78,843.60/x
  3. Step 3: Cross multiply
    143,371.72x = 197,857.95 × 78,843.60
  4. Step 4: Simplify right side
    143,371.72x = 15,599,832,672.40
  5. Step 5: Solve for x
    x = 15,599,832,672.40/143,371.72
  6. Step 6: Final answer
    x = 108,806.90

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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.