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Finding the Fourth Proportional to 127,279.62, 190,917.60 and 43,021.80

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Solution

The fourth proportional to 127,279.62, 190,917.60 and 43,021.80 is: 64,532.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,279.62 : 190,917.60 = 43,021.80 : x
  2. Step 2: Convert to fraction form
    127,279.62/190,917.60 = 43,021.80/x
  3. Step 3: Cross multiply
    127,279.62x = 190,917.60 × 43,021.80
  4. Step 4: Simplify right side
    127,279.62x = 8,213,618,803.68
  5. Step 5: Solve for x
    x = 8,213,618,803.68/127,279.62
  6. Step 6: Final answer
    x = 64,532.08

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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.