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Finding the Fourth Proportional to 203,632.88, 305,326.56 and 91,292.78

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Solution

The fourth proportional to 203,632.88, 305,326.56 and 91,292.78 is: 136,884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,632.88 : 305,326.56 = 91,292.78 : x
  2. Step 2: Convert to fraction form
    203,632.88/305,326.56 = 91,292.78/x
  3. Step 3: Cross multiply
    203,632.88x = 305,326.56 × 91,292.78
  4. Step 4: Simplify right side
    203,632.88x = 27,874,110,470.24
  5. Step 5: Solve for x
    x = 27,874,110,470.24/203,632.88
  6. Step 6: Final answer
    x = 136,884.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.