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Finding the Fourth Proportional to 259,039.20, 388,443.60 and 118,840.80

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Solution

The fourth proportional to 259,039.20, 388,443.60 and 118,840.80 is: 178,208.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,039.20 : 388,443.60 = 118,840.80 : x
  2. Step 2: Convert to fraction form
    259,039.20/388,443.60 = 118,840.80/x
  3. Step 3: Cross multiply
    259,039.20x = 388,443.60 × 118,840.80
  4. Step 4: Simplify right side
    259,039.20x = 46,162,948,178.88
  5. Step 5: Solve for x
    x = 46,162,948,178.88/259,039.20
  6. Step 6: Final answer
    x = 178,208.35

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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.