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Finding the Fourth Proportional to 84,884, 126,429.36 and 80,443.04

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Solution

The fourth proportional to 84,884, 126,429.36 and 80,443.04 is: 119,814.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,884 : 126,429.36 = 80,443.04 : x
  2. Step 2: Convert to fraction form
    84,884/126,429.36 = 80,443.04/x
  3. Step 3: Cross multiply
    84,884x = 126,429.36 × 80,443.04
  4. Step 4: Simplify right side
    84,884x = 10,170,362,063.65
  5. Step 5: Solve for x
    x = 10,170,362,063.65/84,884
  6. Step 6: Final answer
    x = 119,814.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.