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Finding the Fourth Proportional to 118,843.74, 178,209.90 and 68,938.02

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Solution

The fourth proportional to 118,843.74, 178,209.90 and 68,938.02 is: 103,374.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,843.74 : 178,209.90 = 68,938.02 : x
  2. Step 2: Convert to fraction form
    118,843.74/178,209.90 = 68,938.02/x
  3. Step 3: Cross multiply
    118,843.74x = 178,209.90 × 68,938.02
  4. Step 4: Simplify right side
    118,843.74x = 12,285,437,650.40
  5. Step 5: Solve for x
    x = 12,285,437,650.40/118,843.74
  6. Step 6: Final answer
    x = 103,374.71

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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.