Home / 137,311.92-189,481.28-76,872.36

Finding the Fourth Proportional to 137,311.92, 189,481.28 and 76,872.36

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Solution

The fourth proportional to 137,311.92, 189,481.28 and 76,872.36 is: 106,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,311.92 : 189,481.28 = 76,872.36 : x
  2. Step 2: Convert to fraction form
    137,311.92/189,481.28 = 76,872.36/x
  3. Step 3: Cross multiply
    137,311.92x = 189,481.28 × 76,872.36
  4. Step 4: Simplify right side
    137,311.92x = 14,565,873,169.42
  5. Step 5: Solve for x
    x = 14,565,873,169.42/137,311.92
  6. Step 6: Final answer
    x = 106,078.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.