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Finding the Fourth Proportional to 235,718.94, 325,285.92 and 128,286.66

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Solution

The fourth proportional to 235,718.94, 325,285.92 and 128,286.66 is: 177,032.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,718.94 : 325,285.92 = 128,286.66 : x
  2. Step 2: Convert to fraction form
    235,718.94/325,285.92 = 128,286.66/x
  3. Step 3: Cross multiply
    235,718.94x = 325,285.92 × 128,286.66
  4. Step 4: Simplify right side
    235,718.94x = 41,729,844,221.83
  5. Step 5: Solve for x
    x = 41,729,844,221.83/235,718.94
  6. Step 6: Final answer
    x = 177,032.21

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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.