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Finding the Fourth Proportional to 126,613.97, 189,850.84 and 51,786.66

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Solution

The fourth proportional to 126,613.97, 189,850.84 and 51,786.66 is: 77,651.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,613.97 : 189,850.84 = 51,786.66 : x
  2. Step 2: Convert to fraction form
    126,613.97/189,850.84 = 51,786.66/x
  3. Step 3: Cross multiply
    126,613.97x = 189,850.84 × 51,786.66
  4. Step 4: Simplify right side
    126,613.97x = 9,831,740,683.34
  5. Step 5: Solve for x
    x = 9,831,740,683.34/126,613.97
  6. Step 6: Final answer
    x = 77,651.31

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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.