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Finding the Fourth Proportional to 255,236.26, 382,872.12 and 86,687.86

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Solution

The fourth proportional to 255,236.26, 382,872.12 and 86,687.86 is: 130,037.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,236.26 : 382,872.12 = 86,687.86 : x
  2. Step 2: Convert to fraction form
    255,236.26/382,872.12 = 86,687.86/x
  3. Step 3: Cross multiply
    255,236.26x = 382,872.12 × 86,687.86
  4. Step 4: Simplify right side
    255,236.26x = 33,190,364,736.46
  5. Step 5: Solve for x
    x = 33,190,364,736.46/255,236.26
  6. Step 6: Final answer
    x = 130,037.81

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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.