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Finding the Fourth Proportional to 236,121.94, 325,838.82 and 128,689.72

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Solution

The fourth proportional to 236,121.94, 325,838.82 and 128,689.72 is: 177,586.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,121.94 : 325,838.82 = 128,689.72 : x
  2. Step 2: Convert to fraction form
    236,121.94/325,838.82 = 128,689.72/x
  3. Step 3: Cross multiply
    236,121.94x = 325,838.82 × 128,689.72
  4. Step 4: Simplify right side
    236,121.94x = 41,932,106,510.93
  5. Step 5: Solve for x
    x = 41,932,106,510.93/236,121.94
  6. Step 6: Final answer
    x = 177,586.66

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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.