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Finding the Fourth Proportional to 239,404.96, 330,378 and 138,860.32

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Solution

The fourth proportional to 239,404.96, 330,378 and 138,860.32 is: 191,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,404.96 : 330,378 = 138,860.32 : x
  2. Step 2: Convert to fraction form
    239,404.96/330,378 = 138,860.32/x
  3. Step 3: Cross multiply
    239,404.96x = 330,378 × 138,860.32
  4. Step 4: Simplify right side
    239,404.96x = 45,876,394,800.96
  5. Step 5: Solve for x
    x = 45,876,394,800.96/239,404.96
  6. Step 6: Final answer
    x = 191,626.75

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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.