Home / 128,212.97-192,362.27-80,773.29

Finding the Fourth Proportional to 128,212.97, 192,362.27 and 80,773.29

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Solution

The fourth proportional to 128,212.97, 192,362.27 and 80,773.29 is: 121,186.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,212.97 : 192,362.27 = 80,773.29 : x
  2. Step 2: Convert to fraction form
    128,212.97/192,362.27 = 80,773.29/x
  3. Step 3: Cross multiply
    128,212.97x = 192,362.27 × 80,773.29
  4. Step 4: Simplify right side
    128,212.97x = 15,537,733,015.90
  5. Step 5: Solve for x
    x = 15,537,733,015.90/128,212.97
  6. Step 6: Final answer
    x = 121,186.91

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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.