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Finding the Fourth Proportional to 208,963.53, 288,375.39 and 122,928.57

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Solution

The fourth proportional to 208,963.53, 288,375.39 and 122,928.57 is: 169,644.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,963.53 : 288,375.39 = 122,928.57 : x
  2. Step 2: Convert to fraction form
    208,963.53/288,375.39 = 122,928.57/x
  3. Step 3: Cross multiply
    208,963.53x = 288,375.39 × 122,928.57
  4. Step 4: Simplify right side
    208,963.53x = 35,449,574,315.89
  5. Step 5: Solve for x
    x = 35,449,574,315.89/208,963.53
  6. Step 6: Final answer
    x = 169,644.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.