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Finding the Fourth Proportional to 258,039.56, 386,960.82 and 123,079.80

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Solution

The fourth proportional to 258,039.56, 386,960.82 and 123,079.80 is: 184,572.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,039.56 : 386,960.82 = 123,079.80 : x
  2. Step 2: Convert to fraction form
    258,039.56/386,960.82 = 123,079.80/x
  3. Step 3: Cross multiply
    258,039.56x = 386,960.82 × 123,079.80
  4. Step 4: Simplify right side
    258,039.56x = 47,627,060,333.44
  5. Step 5: Solve for x
    x = 47,627,060,333.44/258,039.56
  6. Step 6: Final answer
    x = 184,572.71

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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.