Home / 128,265.10-192,440.31-80,825.38

Finding the Fourth Proportional to 128,265.10, 192,440.31 and 80,825.38

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Solution

The fourth proportional to 128,265.10, 192,440.31 and 80,825.38 is: 121,264.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,265.10 : 192,440.31 = 80,825.38 : x
  2. Step 2: Convert to fraction form
    128,265.10/192,440.31 = 80,825.38/x
  3. Step 3: Cross multiply
    128,265.10x = 192,440.31 × 80,825.38
  4. Step 4: Simplify right side
    128,265.10x = 15,554,061,183.07
  5. Step 5: Solve for x
    x = 15,554,061,183.07/128,265.10
  6. Step 6: Final answer
    x = 121,264.95

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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.