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Finding the Fourth Proportional to 126,442.44, 189,690.99 and 67,269.51

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Solution

The fourth proportional to 126,442.44, 189,690.99 and 67,269.51 is: 100,918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,442.44 : 189,690.99 = 67,269.51 : x
  2. Step 2: Convert to fraction form
    126,442.44/189,690.99 = 67,269.51/x
  3. Step 3: Cross multiply
    126,442.44x = 189,690.99 × 67,269.51
  4. Step 4: Simplify right side
    126,442.44x = 12,760,419,948.71
  5. Step 5: Solve for x
    x = 12,760,419,948.71/126,442.44
  6. Step 6: Final answer
    x = 100,918.81

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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.