Home / 213,828.12-320,813.42-71,687.45

Finding the Fourth Proportional to 213,828.12, 320,813.42 and 71,687.45

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Solution

The fourth proportional to 213,828.12, 320,813.42 and 71,687.45 is: 107,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,828.12 : 320,813.42 = 71,687.45 : x
  2. Step 2: Convert to fraction form
    213,828.12/320,813.42 = 71,687.45/x
  3. Step 3: Cross multiply
    213,828.12x = 320,813.42 × 71,687.45
  4. Step 4: Simplify right side
    213,828.12x = 22,998,294,043.07
  5. Step 5: Solve for x
    x = 22,998,294,043.07/213,828.12
  6. Step 6: Final answer
    x = 107,555.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.