Home / 143,279.37-197,715.92-78,747.21

Finding the Fourth Proportional to 143,279.37, 197,715.92 and 78,747.21

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Solution

The fourth proportional to 143,279.37, 197,715.92 and 78,747.21 is: 108,665.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,279.37 : 197,715.92 = 78,747.21 : x
  2. Step 2: Convert to fraction form
    143,279.37/197,715.92 = 78,747.21/x
  3. Step 3: Cross multiply
    143,279.37x = 197,715.92 × 78,747.21
  4. Step 4: Simplify right side
    143,279.37x = 15,569,576,678.85
  5. Step 5: Solve for x
    x = 15,569,576,678.85/143,279.37
  6. Step 6: Final answer
    x = 108,665.87

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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.