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Finding the Fourth Proportional to 235,889.21, 325,518.48 and 128,456.87

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Solution

The fourth proportional to 235,889.21, 325,518.48 and 128,456.87 is: 177,265.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,889.21 : 325,518.48 = 128,456.87 : x
  2. Step 2: Convert to fraction form
    235,889.21/325,518.48 = 128,456.87/x
  3. Step 3: Cross multiply
    235,889.21x = 325,518.48 × 128,456.87
  4. Step 4: Simplify right side
    235,889.21x = 41,815,085,067.96
  5. Step 5: Solve for x
    x = 41,815,085,067.96/235,889.21
  6. Step 6: Final answer
    x = 177,265.78

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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.