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Finding the Fourth Proportional to 66,481.83, 99,638.51 and 65,778.75

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Solution

The fourth proportional to 66,481.83, 99,638.51 and 65,778.75 is: 98,584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.83 : 99,638.51 = 65,778.75 : x
  2. Step 2: Convert to fraction form
    66,481.83/99,638.51 = 65,778.75/x
  3. Step 3: Cross multiply
    66,481.83x = 99,638.51 × 65,778.75
  4. Step 4: Simplify right side
    66,481.83x = 6,554,096,310.77
  5. Step 5: Solve for x
    x = 6,554,096,310.77/66,481.83
  6. Step 6: Final answer
    x = 98,584.78

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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.