Home / 285,619.80-428,429.70-108,132.60

Finding the Fourth Proportional to 285,619.80, 428,429.70 and 108,132.60

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Solution

The fourth proportional to 285,619.80, 428,429.70 and 108,132.60 is: 162,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,619.80 : 428,429.70 = 108,132.60 : x
  2. Step 2: Convert to fraction form
    285,619.80/428,429.70 = 108,132.60/x
  3. Step 3: Cross multiply
    285,619.80x = 428,429.70 × 108,132.60
  4. Step 4: Simplify right side
    285,619.80x = 46,327,217,378.22
  5. Step 5: Solve for x
    x = 46,327,217,378.22/285,619.80
  6. Step 6: Final answer
    x = 162,198.90

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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.