Home / 100,456.26-150,684.38-78,286.22

Finding the Fourth Proportional to 100,456.26, 150,684.38 and 78,286.22

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Solution

The fourth proportional to 100,456.26, 150,684.38 and 78,286.22 is: 117,429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,456.26 : 150,684.38 = 78,286.22 : x
  2. Step 2: Convert to fraction form
    100,456.26/150,684.38 = 78,286.22/x
  3. Step 3: Cross multiply
    100,456.26x = 150,684.38 × 78,286.22
  4. Step 4: Simplify right side
    100,456.26x = 11,796,510,677.39
  5. Step 5: Solve for x
    x = 11,796,510,677.39/100,456.26
  6. Step 6: Final answer
    x = 117,429.33

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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.