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Finding the Fourth Proportional to 99,672.30, 149,738.85 and 68,568.30

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Solution

The fourth proportional to 99,672.30, 149,738.85 and 68,568.30 is: 103,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672.30 : 149,738.85 = 68,568.30 : x
  2. Step 2: Convert to fraction form
    99,672.30/149,738.85 = 68,568.30/x
  3. Step 3: Cross multiply
    99,672.30x = 149,738.85 × 68,568.30
  4. Step 4: Simplify right side
    99,672.30x = 10,267,338,388.46
  5. Step 5: Solve for x
    x = 10,267,338,388.46/99,672.30
  6. Step 6: Final answer
    x = 103,010.95

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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.