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Finding the Fourth Proportional to 128,757.68, 193,179 and 49,872.32

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Solution

The fourth proportional to 128,757.68, 193,179 and 49,872.32 is: 74,824.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,757.68 : 193,179 = 49,872.32 : x
  2. Step 2: Convert to fraction form
    128,757.68/193,179 = 49,872.32/x
  3. Step 3: Cross multiply
    128,757.68x = 193,179 × 49,872.32
  4. Step 4: Simplify right side
    128,757.68x = 9,634,284,905.28
  5. Step 5: Solve for x
    x = 9,634,284,905.28/128,757.68
  6. Step 6: Final answer
    x = 74,824.93

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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.