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Finding the Fourth Proportional to 256,657.49, 384,857.73 and 79,141.43

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Solution

The fourth proportional to 256,657.49, 384,857.73 and 79,141.43 is: 118,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,657.49 : 384,857.73 = 79,141.43 : x
  2. Step 2: Convert to fraction form
    256,657.49/384,857.73 = 79,141.43/x
  3. Step 3: Cross multiply
    256,657.49x = 384,857.73 × 79,141.43
  4. Step 4: Simplify right side
    256,657.49x = 30,458,189,174.47
  5. Step 5: Solve for x
    x = 30,458,189,174.47/256,657.49
  6. Step 6: Final answer
    x = 118,672.51

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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.