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Finding the Fourth Proportional to 258,891.81, 388,382.00 and 118,662.45

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Solution

The fourth proportional to 258,891.81, 388,382.00 and 118,662.45 is: 178,013.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,891.81 : 388,382.00 = 118,662.45 : x
  2. Step 2: Convert to fraction form
    258,891.81/388,382.00 = 118,662.45/x
  3. Step 3: Cross multiply
    258,891.81x = 388,382.00 × 118,662.45
  4. Step 4: Simplify right side
    258,891.81x = 46,086,359,062.59
  5. Step 5: Solve for x
    x = 46,086,359,062.59/258,891.81
  6. Step 6: Final answer
    x = 178,013.97

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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.