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Finding the Fourth Proportional to 99,297.73, 136,899.21 and 82,239.13

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Solution

The fourth proportional to 99,297.73, 136,899.21 and 82,239.13 is: 113,380.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,297.73 : 136,899.21 = 82,239.13 : x
  2. Step 2: Convert to fraction form
    99,297.73/136,899.21 = 82,239.13/x
  3. Step 3: Cross multiply
    99,297.73x = 136,899.21 × 82,239.13
  4. Step 4: Simplify right side
    99,297.73x = 11,258,471,928.09
  5. Step 5: Solve for x
    x = 11,258,471,928.09/99,297.73
  6. Step 6: Final answer
    x = 113,380.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.