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Finding the Fourth Proportional to 100,268.80, 150,403.20 and 80,585.80

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Solution

The fourth proportional to 100,268.80, 150,403.20 and 80,585.80 is: 120,878.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,268.80 : 150,403.20 = 80,585.80 : x
  2. Step 2: Convert to fraction form
    100,268.80/150,403.20 = 80,585.80/x
  3. Step 3: Cross multiply
    100,268.80x = 150,403.20 × 80,585.80
  4. Step 4: Simplify right side
    100,268.80x = 12,120,362,194.56
  5. Step 5: Solve for x
    x = 12,120,362,194.56/100,268.80
  6. Step 6: Final answer
    x = 120,878.70

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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.