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Finding the Fourth Proportional to 235,843.47, 325,469.82 and 128,419.38

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Solution

The fourth proportional to 235,843.47, 325,469.82 and 128,419.38 is: 177,221.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,843.47 : 325,469.82 = 128,419.38 : x
  2. Step 2: Convert to fraction form
    235,843.47/325,469.82 = 128,419.38/x
  3. Step 3: Cross multiply
    235,843.47x = 325,469.82 × 128,419.38
  4. Step 4: Simplify right side
    235,843.47x = 41,796,632,493.11
  5. Step 5: Solve for x
    x = 41,796,632,493.11/235,843.47
  6. Step 6: Final answer
    x = 177,221.92

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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.