Home / 128,067.50-192,236.51-71,955.56

Finding the Fourth Proportional to 128,067.50, 192,236.51 and 71,955.56

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Solution

The fourth proportional to 128,067.50, 192,236.51 and 71,955.56 is: 108,009.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,067.50 : 192,236.51 = 71,955.56 : x
  2. Step 2: Convert to fraction form
    128,067.50/192,236.51 = 71,955.56/x
  3. Step 3: Cross multiply
    128,067.50x = 192,236.51 × 71,955.56
  4. Step 4: Simplify right side
    128,067.50x = 13,832,484,948.20
  5. Step 5: Solve for x
    x = 13,832,484,948.20/128,067.50
  6. Step 6: Final answer
    x = 108,009.33

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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.