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Finding the Fourth Proportional to 393,137.82, 589,706.76 and 126,937.56

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Solution

The fourth proportional to 393,137.82, 589,706.76 and 126,937.56 is: 190,406.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,137.82 : 589,706.76 = 126,937.56 : x
  2. Step 2: Convert to fraction form
    393,137.82/589,706.76 = 126,937.56/x
  3. Step 3: Cross multiply
    393,137.82x = 589,706.76 × 126,937.56
  4. Step 4: Simplify right side
    393,137.82x = 74,855,937,229.91
  5. Step 5: Solve for x
    x = 74,855,937,229.91/393,137.82
  6. Step 6: Final answer
    x = 190,406.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.