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Finding the Fourth Proportional to 126,801.82, 190,131.60 and 86,865.91

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Solution

The fourth proportional to 126,801.82, 190,131.60 and 86,865.91 is: 130,250.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,801.82 : 190,131.60 = 86,865.91 : x
  2. Step 2: Convert to fraction form
    126,801.82/190,131.60 = 86,865.91/x
  3. Step 3: Cross multiply
    126,801.82x = 190,131.60 × 86,865.91
  4. Step 4: Simplify right side
    126,801.82x = 16,515,954,453.76
  5. Step 5: Solve for x
    x = 16,515,954,453.76/126,801.82
  6. Step 6: Final answer
    x = 130,250.14

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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.