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Finding the Fourth Proportional to 268,433.32, 402,640.75 and 68,755.43

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Solution

The fourth proportional to 268,433.32, 402,640.75 and 68,755.43 is: 103,130.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,433.32 : 402,640.75 = 68,755.43 : x
  2. Step 2: Convert to fraction form
    268,433.32/402,640.75 = 68,755.43/x
  3. Step 3: Cross multiply
    268,433.32x = 402,640.75 × 68,755.43
  4. Step 4: Simplify right side
    268,433.32x = 27,683,738,800.94
  5. Step 5: Solve for x
    x = 27,683,738,800.94/268,433.32
  6. Step 6: Final answer
    x = 103,130.79

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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.