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Finding the Fourth Proportional to 137,086.20, 205,629.30 and 74,100.60

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Solution

The fourth proportional to 137,086.20, 205,629.30 and 74,100.60 is: 111,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,086.20 : 205,629.30 = 74,100.60 : x
  2. Step 2: Convert to fraction form
    137,086.20/205,629.30 = 74,100.60/x
  3. Step 3: Cross multiply
    137,086.20x = 205,629.30 × 74,100.60
  4. Step 4: Simplify right side
    137,086.20x = 15,237,254,507.58
  5. Step 5: Solve for x
    x = 15,237,254,507.58/137,086.20
  6. Step 6: Final answer
    x = 111,150.90

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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.