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Finding the Fourth Proportional to 239,872.96, 331,039.68 and 137,930.88

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Solution

The fourth proportional to 239,872.96, 331,039.68 and 137,930.88 is: 190,353.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,872.96 : 331,039.68 = 137,930.88 : x
  2. Step 2: Convert to fraction form
    239,872.96/331,039.68 = 137,930.88/x
  3. Step 3: Cross multiply
    239,872.96x = 331,039.68 × 137,930.88
  4. Step 4: Simplify right side
    239,872.96x = 45,660,594,377.32
  5. Step 5: Solve for x
    x = 45,660,594,377.32/239,872.96
  6. Step 6: Final answer
    x = 190,353.24

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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.