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Finding the Fourth Proportional to 255,105.60, 382,642.20 and 86,625.60

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Solution

The fourth proportional to 255,105.60, 382,642.20 and 86,625.60 is: 129,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,105.60 : 382,642.20 = 86,625.60 : x
  2. Step 2: Convert to fraction form
    255,105.60/382,642.20 = 86,625.60/x
  3. Step 3: Cross multiply
    255,105.60x = 382,642.20 × 86,625.60
  4. Step 4: Simplify right side
    255,105.60x = 33,146,610,160.32
  5. Step 5: Solve for x
    x = 33,146,610,160.32/255,105.60
  6. Step 6: Final answer
    x = 129,932.90

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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.