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Finding the Fourth Proportional to 100,448.60, 150,672.90 and 30,318.80

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Solution

The fourth proportional to 100,448.60, 150,672.90 and 30,318.80 is: 45,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,448.60 : 150,672.90 = 30,318.80 : x
  2. Step 2: Convert to fraction form
    100,448.60/150,672.90 = 30,318.80/x
  3. Step 3: Cross multiply
    100,448.60x = 150,672.90 × 30,318.80
  4. Step 4: Simplify right side
    100,448.60x = 4,568,221,520.52
  5. Step 5: Solve for x
    x = 4,568,221,520.52/100,448.60
  6. Step 6: Final answer
    x = 45,478.20

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1.5x scale

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.