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Finding the Fourth Proportional to 126,142, 189,166.78 and 41,886.88

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Solution

The fourth proportional to 126,142, 189,166.78 and 41,886.88 is: 62,814.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,142 : 189,166.78 = 41,886.88 : x
  2. Step 2: Convert to fraction form
    126,142/189,166.78 = 41,886.88/x
  3. Step 3: Cross multiply
    126,142x = 189,166.78 × 41,886.88
  4. Step 4: Simplify right side
    126,142x = 7,923,606,213.85
  5. Step 5: Solve for x
    x = 7,923,606,213.85/126,142
  6. Step 6: Final answer
    x = 62,814.97

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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.