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Finding the Fourth Proportional to 137,796.90, 206,502.90 and 74,480.55

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Solution

The fourth proportional to 137,796.90, 206,502.90 and 74,480.55 is: 111,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,796.90 : 206,502.90 = 74,480.55 : x
  2. Step 2: Convert to fraction form
    137,796.90/206,502.90 = 74,480.55/x
  3. Step 3: Cross multiply
    137,796.90x = 206,502.90 × 74,480.55
  4. Step 4: Simplify right side
    137,796.90x = 15,380,449,568.60
  5. Step 5: Solve for x
    x = 15,380,449,568.60/137,796.90
  6. Step 6: Final answer
    x = 111,616.80

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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.