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Finding the Fourth Proportional to 98,469.84, 135,546.30 and 85,872.72

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Solution

The fourth proportional to 98,469.84, 135,546.30 and 85,872.72 is: 118,206.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,469.84 : 135,546.30 = 85,872.72 : x
  2. Step 2: Convert to fraction form
    98,469.84/135,546.30 = 85,872.72/x
  3. Step 3: Cross multiply
    98,469.84x = 135,546.30 × 85,872.72
  4. Step 4: Simplify right side
    98,469.84x = 11,639,729,466.94
  5. Step 5: Solve for x
    x = 11,639,729,466.94/98,469.84
  6. Step 6: Final answer
    x = 118,206.04

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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.