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Finding the Fourth Proportional to 239,399.57, 330,367.28 and 131,979.60

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Solution

The fourth proportional to 239,399.57, 330,367.28 and 131,979.60 is: 182,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,399.57 : 330,367.28 = 131,979.60 : x
  2. Step 2: Convert to fraction form
    239,399.57/330,367.28 = 131,979.60/x
  3. Step 3: Cross multiply
    239,399.57x = 330,367.28 × 131,979.60
  4. Step 4: Simplify right side
    239,399.57x = 43,601,740,807.59
  5. Step 5: Solve for x
    x = 43,601,740,807.59/239,399.57
  6. Step 6: Final answer
    x = 182,129.57

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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.