Home / 143,389.34-197,879.57-78,861.39

Finding the Fourth Proportional to 143,389.34, 197,879.57 and 78,861.39

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Solution

The fourth proportional to 143,389.34, 197,879.57 and 78,861.39 is: 108,829.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,389.34 : 197,879.57 = 78,861.39 : x
  2. Step 2: Convert to fraction form
    143,389.34/197,879.57 = 78,861.39/x
  3. Step 3: Cross multiply
    143,389.34x = 197,879.57 × 78,861.39
  4. Step 4: Simplify right side
    143,389.34x = 15,605,057,548.50
  5. Step 5: Solve for x
    x = 15,605,057,548.50/143,389.34
  6. Step 6: Final answer
    x = 108,829.97

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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.