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Finding the Fourth Proportional to 255,425.43, 383,169.95 and 86,932.80

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Solution

The fourth proportional to 255,425.43, 383,169.95 and 86,932.80 is: 130,410.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,425.43 : 383,169.95 = 86,932.80 : x
  2. Step 2: Convert to fraction form
    255,425.43/383,169.95 = 86,932.80/x
  3. Step 3: Cross multiply
    255,425.43x = 383,169.95 × 86,932.80
  4. Step 4: Simplify right side
    255,425.43x = 33,310,037,152.62
  5. Step 5: Solve for x
    x = 33,310,037,152.62/255,425.43
  6. Step 6: Final answer
    x = 130,410.03

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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.