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Finding the Fourth Proportional to 126,469.80, 189,704.70 and 119,212.20

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Solution

The fourth proportional to 126,469.80, 189,704.70 and 119,212.20 is: 178,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,469.80 : 189,704.70 = 119,212.20 : x
  2. Step 2: Convert to fraction form
    126,469.80/189,704.70 = 119,212.20/x
  3. Step 3: Cross multiply
    126,469.80x = 189,704.70 × 119,212.20
  4. Step 4: Simplify right side
    126,469.80x = 22,615,114,637.34
  5. Step 5: Solve for x
    x = 22,615,114,637.34/126,469.80
  6. Step 6: Final answer
    x = 178,818.30

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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.