Home / 128,947.88-193,282.32-54,108.68

Finding the Fourth Proportional to 128,947.88, 193,282.32 and 54,108.68

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Solution

The fourth proportional to 128,947.88, 193,282.32 and 54,108.68 is: 81,104.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,947.88 : 193,282.32 = 54,108.68 : x
  2. Step 2: Convert to fraction form
    128,947.88/193,282.32 = 54,108.68/x
  3. Step 3: Cross multiply
    128,947.88x = 193,282.32 × 54,108.68
  4. Step 4: Simplify right side
    128,947.88x = 10,458,251,202.54
  5. Step 5: Solve for x
    x = 10,458,251,202.54/128,947.88
  6. Step 6: Final answer
    x = 81,104.48

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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.