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Finding the Fourth Proportional to 268,328.70, 402,506.82 and 68,650.81

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Solution

The fourth proportional to 268,328.70, 402,506.82 and 68,650.81 is: 102,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,328.70 : 402,506.82 = 68,650.81 : x
  2. Step 2: Convert to fraction form
    268,328.70/402,506.82 = 68,650.81/x
  3. Step 3: Cross multiply
    268,328.70x = 402,506.82 × 68,650.81
  4. Step 4: Simplify right side
    268,328.70x = 27,632,418,217.26
  5. Step 5: Solve for x
    x = 27,632,418,217.26/268,328.70
  6. Step 6: Final answer
    x = 102,979.73

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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.