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Finding the Fourth Proportional to 258,887.56, 388,375.62 and 118,658.20

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Solution

The fourth proportional to 258,887.56, 388,375.62 and 118,658.20 is: 178,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,887.56 : 388,375.62 = 118,658.20 : x
  2. Step 2: Convert to fraction form
    258,887.56/388,375.62 = 118,658.20/x
  3. Step 3: Cross multiply
    258,887.56x = 388,375.62 × 118,658.20
  4. Step 4: Simplify right side
    258,887.56x = 46,083,951,993.08
  5. Step 5: Solve for x
    x = 46,083,951,993.08/258,887.56
  6. Step 6: Final answer
    x = 178,007.60

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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.