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Finding the Fourth Proportional to 87,425.42, 130,640.42 and 65,644.88

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Solution

The fourth proportional to 87,425.42, 130,640.42 and 65,644.88 is: 98,093.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,425.42 : 130,640.42 = 65,644.88 : x
  2. Step 2: Convert to fraction form
    87,425.42/130,640.42 = 65,644.88/x
  3. Step 3: Cross multiply
    87,425.42x = 130,640.42 × 65,644.88
  4. Step 4: Simplify right side
    87,425.42x = 8,575,874,694.05
  5. Step 5: Solve for x
    x = 8,575,874,694.05/87,425.42
  6. Step 6: Final answer
    x = 98,093.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.