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Finding the Fourth Proportional to 137,720.60, 206,580.90 and 49,074.20

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Solution

The fourth proportional to 137,720.60, 206,580.90 and 49,074.20 is: 73,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,720.60 : 206,580.90 = 49,074.20 : x
  2. Step 2: Convert to fraction form
    137,720.60/206,580.90 = 49,074.20/x
  3. Step 3: Cross multiply
    137,720.60x = 206,580.90 × 49,074.20
  4. Step 4: Simplify right side
    137,720.60x = 10,137,792,402.78
  5. Step 5: Solve for x
    x = 10,137,792,402.78/137,720.60
  6. Step 6: Final answer
    x = 73,611.30

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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.