Home / 128,383.12-191,721.64-126,993.04

Finding the Fourth Proportional to 128,383.12, 191,721.64 and 126,993.04

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Solution

The fourth proportional to 128,383.12, 191,721.64 and 126,993.04 is: 189,645.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.12 : 191,721.64 = 126,993.04 : x
  2. Step 2: Convert to fraction form
    128,383.12/191,721.64 = 126,993.04/x
  3. Step 3: Cross multiply
    128,383.12x = 191,721.64 × 126,993.04
  4. Step 4: Simplify right side
    128,383.12x = 24,347,313,897.39
  5. Step 5: Solve for x
    x = 24,347,313,897.39/128,383.12
  6. Step 6: Final answer
    x = 189,645.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.