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Finding the Fourth Proportional to 126,357.69, 189,424.85 and 51,540.42

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Solution

The fourth proportional to 126,357.69, 189,424.85 and 51,540.42 is: 77,265.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,357.69 : 189,424.85 = 51,540.42 : x
  2. Step 2: Convert to fraction form
    126,357.69/189,424.85 = 51,540.42/x
  3. Step 3: Cross multiply
    126,357.69x = 189,424.85 × 51,540.42
  4. Step 4: Simplify right side
    126,357.69x = 9,763,036,069.73
  5. Step 5: Solve for x
    x = 9,763,036,069.73/126,357.69
  6. Step 6: Final answer
    x = 77,265.07

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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.