Home / 72,712.05-109,067.67-20,121.45

Finding the Fourth Proportional to 72,712.05, 109,067.67 and 20,121.45

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Solution

The fourth proportional to 72,712.05, 109,067.67 and 20,121.45 is: 30,182.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,712.05 : 109,067.67 = 20,121.45 : x
  2. Step 2: Convert to fraction form
    72,712.05/109,067.67 = 20,121.45/x
  3. Step 3: Cross multiply
    72,712.05x = 109,067.67 × 20,121.45
  4. Step 4: Simplify right side
    72,712.05x = 2,194,599,668.52
  5. Step 5: Solve for x
    x = 2,194,599,668.52/72,712.05
  6. Step 6: Final answer
    x = 30,182.06

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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.