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Finding the Fourth Proportional to 203,939.70, 281,476.80 and 130,304.79

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Solution

The fourth proportional to 203,939.70, 281,476.80 and 130,304.79 is: 179,846.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,939.70 : 281,476.80 = 130,304.79 : x
  2. Step 2: Convert to fraction form
    203,939.70/281,476.80 = 130,304.79/x
  3. Step 3: Cross multiply
    203,939.70x = 281,476.80 × 130,304.79
  4. Step 4: Simplify right side
    203,939.70x = 36,677,775,313.87
  5. Step 5: Solve for x
    x = 36,677,775,313.87/203,939.70
  6. Step 6: Final answer
    x = 179,846.18

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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.