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Finding the Fourth Proportional to 215,704.40, 323,748.60 and 126,846.80

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Solution

The fourth proportional to 215,704.40, 323,748.60 and 126,846.80 is: 190,383.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,704.40 : 323,748.60 = 126,846.80 : x
  2. Step 2: Convert to fraction form
    215,704.40/323,748.60 = 126,846.80/x
  3. Step 3: Cross multiply
    215,704.40x = 323,748.60 × 126,846.80
  4. Step 4: Simplify right side
    215,704.40x = 41,066,473,914.48
  5. Step 5: Solve for x
    x = 41,066,473,914.48/215,704.40
  6. Step 6: Final answer
    x = 190,383.11

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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.