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Finding the Fourth Proportional to 239,691.69, 330,763.41 and 137,645.33

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Solution

The fourth proportional to 239,691.69, 330,763.41 and 137,645.33 is: 189,944.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,691.69 : 330,763.41 = 137,645.33 : x
  2. Step 2: Convert to fraction form
    239,691.69/330,763.41 = 137,645.33/x
  3. Step 3: Cross multiply
    239,691.69x = 330,763.41 × 137,645.33
  4. Step 4: Simplify right side
    239,691.69x = 45,528,037,067.56
  5. Step 5: Solve for x
    x = 45,528,037,067.56/239,691.69
  6. Step 6: Final answer
    x = 189,944.16

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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.