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Finding the Fourth Proportional to 137,912.80, 206,820.60 and 49,169.20

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Solution

The fourth proportional to 137,912.80, 206,820.60 and 49,169.20 is: 73,736.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,912.80 : 206,820.60 = 49,169.20 : x
  2. Step 2: Convert to fraction form
    137,912.80/206,820.60 = 49,169.20/x
  3. Step 3: Cross multiply
    137,912.80x = 206,820.60 × 49,169.20
  4. Step 4: Simplify right side
    137,912.80x = 10,169,203,445.52
  5. Step 5: Solve for x
    x = 10,169,203,445.52/137,912.80
  6. Step 6: Final answer
    x = 73,736.47

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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.