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Finding the Fourth Proportional to 255,086.80, 382,618.05 and 86,590.60

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Solution

The fourth proportional to 255,086.80, 382,618.05 and 86,590.60 is: 129,881.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,086.80 : 382,618.05 = 86,590.60 : x
  2. Step 2: Convert to fraction form
    255,086.80/382,618.05 = 86,590.60/x
  3. Step 3: Cross multiply
    255,086.80x = 382,618.05 × 86,590.60
  4. Step 4: Simplify right side
    255,086.80x = 33,131,126,520.33
  5. Step 5: Solve for x
    x = 33,131,126,520.33/255,086.80
  6. Step 6: Final answer
    x = 129,881.78

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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.