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Finding the Fourth Proportional to 137,129.40, 205,694.10 and 43,644.60

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Solution

The fourth proportional to 137,129.40, 205,694.10 and 43,644.60 is: 65,466.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,129.40 : 205,694.10 = 43,644.60 : x
  2. Step 2: Convert to fraction form
    137,129.40/205,694.10 = 43,644.60/x
  3. Step 3: Cross multiply
    137,129.40x = 205,694.10 × 43,644.60
  4. Step 4: Simplify right side
    137,129.40x = 8,977,436,716.86
  5. Step 5: Solve for x
    x = 8,977,436,716.86/137,129.40
  6. Step 6: Final answer
    x = 65,466.90

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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.