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Finding the Fourth Proportional to 239,286.92, 330,223.50 and 137,331

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Solution

The fourth proportional to 239,286.92, 330,223.50 and 137,331 is: 189,521.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,286.92 : 330,223.50 = 137,331 : x
  2. Step 2: Convert to fraction form
    239,286.92/330,223.50 = 137,331/x
  3. Step 3: Cross multiply
    239,286.92x = 330,223.50 × 137,331
  4. Step 4: Simplify right side
    239,286.92x = 45,349,923,478.50
  5. Step 5: Solve for x
    x = 45,349,923,478.50/239,286.92
  6. Step 6: Final answer
    x = 189,521.12

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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.