Home / 205,414.40-308,121.60-72,444.80

Finding the Fourth Proportional to 205,414.40, 308,121.60 and 72,444.80

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Solution

The fourth proportional to 205,414.40, 308,121.60 and 72,444.80 is: 108,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,414.40 : 308,121.60 = 72,444.80 : x
  2. Step 2: Convert to fraction form
    205,414.40/308,121.60 = 72,444.80/x
  3. Step 3: Cross multiply
    205,414.40x = 308,121.60 × 72,444.80
  4. Step 4: Simplify right side
    205,414.40x = 22,321,807,687.68
  5. Step 5: Solve for x
    x = 22,321,807,687.68/205,414.40
  6. Step 6: Final answer
    x = 108,667.20

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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.