Home / 217,131.09-299,653.20-121,668.54

Finding the Fourth Proportional to 217,131.09, 299,653.20 and 121,668.54

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Solution

The fourth proportional to 217,131.09, 299,653.20 and 121,668.54 is: 167,909.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,131.09 : 299,653.20 = 121,668.54 : x
  2. Step 2: Convert to fraction form
    217,131.09/299,653.20 = 121,668.54/x
  3. Step 3: Cross multiply
    217,131.09x = 299,653.20 × 121,668.54
  4. Step 4: Simplify right side
    217,131.09x = 36,458,367,350.33
  5. Step 5: Solve for x
    x = 36,458,367,350.33/217,131.09
  6. Step 6: Final answer
    x = 167,909.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.