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Finding the Fourth Proportional to 239,480.76, 330,505.64 and 137,519.60

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Solution

The fourth proportional to 239,480.76, 330,505.64 and 137,519.60 is: 189,789.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,480.76 : 330,505.64 = 137,519.60 : x
  2. Step 2: Convert to fraction form
    239,480.76/330,505.64 = 137,519.60/x
  3. Step 3: Cross multiply
    239,480.76x = 330,505.64 × 137,519.60
  4. Step 4: Simplify right side
    239,480.76x = 45,451,003,410.54
  5. Step 5: Solve for x
    x = 45,451,003,410.54/239,480.76
  6. Step 6: Final answer
    x = 189,789.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.