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Finding the Fourth Proportional to 236,222.88, 325,979.20 and 128,791.20

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Solution

The fourth proportional to 236,222.88, 325,979.20 and 128,791.20 is: 177,727.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,222.88 : 325,979.20 = 128,791.20 : x
  2. Step 2: Convert to fraction form
    236,222.88/325,979.20 = 128,791.20/x
  3. Step 3: Cross multiply
    236,222.88x = 325,979.20 × 128,791.20
  4. Step 4: Simplify right side
    236,222.88x = 41,983,252,343.04
  5. Step 5: Solve for x
    x = 41,983,252,343.04/236,222.88
  6. Step 6: Final answer
    x = 177,727.29

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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.