Home / 213,620.20-320,430.30-119,141.80

Finding the Fourth Proportional to 213,620.20, 320,430.30 and 119,141.80

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Solution

The fourth proportional to 213,620.20, 320,430.30 and 119,141.80 is: 178,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,620.20 : 320,430.30 = 119,141.80 : x
  2. Step 2: Convert to fraction form
    213,620.20/320,430.30 = 119,141.80/x
  3. Step 3: Cross multiply
    213,620.20x = 320,430.30 × 119,141.80
  4. Step 4: Simplify right side
    213,620.20x = 38,176,642,716.54
  5. Step 5: Solve for x
    x = 38,176,642,716.54/213,620.20
  6. Step 6: Final answer
    x = 178,712.70

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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.