Home / 143,354.70-197,834.58-78,828.86

Finding the Fourth Proportional to 143,354.70, 197,834.58 and 78,828.86

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Solution

The fourth proportional to 143,354.70, 197,834.58 and 78,828.86 is: 108,786.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,354.70 : 197,834.58 = 78,828.86 : x
  2. Step 2: Convert to fraction form
    143,354.70/197,834.58 = 78,828.86/x
  3. Step 3: Cross multiply
    143,354.70x = 197,834.58 × 78,828.86
  4. Step 4: Simplify right side
    143,354.70x = 15,595,074,409.98
  5. Step 5: Solve for x
    x = 15,595,074,409.98/143,354.70
  6. Step 6: Final answer
    x = 108,786.63

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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.