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Finding the Fourth Proportional to 239,709.90, 330,856.28 and 137,794.49

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Solution

The fourth proportional to 239,709.90, 330,856.28 and 137,794.49 is: 190,188.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,709.90 : 330,856.28 = 137,794.49 : x
  2. Step 2: Convert to fraction form
    239,709.90/330,856.28 = 137,794.49/x
  3. Step 3: Cross multiply
    239,709.90x = 330,856.28 × 137,794.49
  4. Step 4: Simplify right side
    239,709.90x = 45,590,172,365.90
  5. Step 5: Solve for x
    x = 45,590,172,365.90/239,709.90
  6. Step 6: Final answer
    x = 190,188.94

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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.