Home / 100,859.20-151,272.60-30,722.20

Finding the Fourth Proportional to 100,859.20, 151,272.60 and 30,722.20

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Solution

The fourth proportional to 100,859.20, 151,272.60 and 30,722.20 is: 46,078.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.20 : 151,272.60 = 30,722.20 : x
  2. Step 2: Convert to fraction form
    100,859.20/151,272.60 = 30,722.20/x
  3. Step 3: Cross multiply
    100,859.20x = 151,272.60 × 30,722.20
  4. Step 4: Simplify right side
    100,859.20x = 4,647,427,071.72
  5. Step 5: Solve for x
    x = 4,647,427,071.72/100,859.20
  6. Step 6: Final answer
    x = 46,078.37

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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.