Home / 128,857.91-193,336.07-72,761.36

Finding the Fourth Proportional to 128,857.91, 193,336.07 and 72,761.36

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Solution

The fourth proportional to 128,857.91, 193,336.07 and 72,761.36 is: 109,169.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857.91 : 193,336.07 = 72,761.36 : x
  2. Step 2: Convert to fraction form
    128,857.91/193,336.07 = 72,761.36/x
  3. Step 3: Cross multiply
    128,857.91x = 193,336.07 × 72,761.36
  4. Step 4: Simplify right side
    128,857.91x = 14,067,394,059.77
  5. Step 5: Solve for x
    x = 14,067,394,059.77/128,857.91
  6. Step 6: Final answer
    x = 109,169.82

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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.