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Finding the Fourth Proportional to 99,672.22, 149,508.32 and 68,412.70

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Solution

The fourth proportional to 99,672.22, 149,508.32 and 68,412.70 is: 102,619.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672.22 : 149,508.32 = 68,412.70 : x
  2. Step 2: Convert to fraction form
    99,672.22/149,508.32 = 68,412.70/x
  3. Step 3: Cross multiply
    99,672.22x = 149,508.32 × 68,412.70
  4. Step 4: Simplify right side
    99,672.22x = 10,228,267,843.66
  5. Step 5: Solve for x
    x = 10,228,267,843.66/99,672.22
  6. Step 6: Final answer
    x = 102,619.04

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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.