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Finding the Fourth Proportional to 85,532.64, 128,310.84 and 26,372.96

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Solution

The fourth proportional to 85,532.64, 128,310.84 and 26,372.96 is: 39,563.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,532.64 : 128,310.84 = 26,372.96 : x
  2. Step 2: Convert to fraction form
    85,532.64/128,310.84 = 26,372.96/x
  3. Step 3: Cross multiply
    85,532.64x = 128,310.84 × 26,372.96
  4. Step 4: Simplify right side
    85,532.64x = 3,383,936,650.89
  5. Step 5: Solve for x
    x = 3,383,936,650.89/85,532.64
  6. Step 6: Final answer
    x = 39,563.10

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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.