Home / 128,186.28-192,264.30-80,661.15

Finding the Fourth Proportional to 128,186.28, 192,264.30 and 80,661.15

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Solution

The fourth proportional to 128,186.28, 192,264.30 and 80,661.15 is: 120,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,186.28 : 192,264.30 = 80,661.15 : x
  2. Step 2: Convert to fraction form
    128,186.28/192,264.30 = 80,661.15/x
  3. Step 3: Cross multiply
    128,186.28x = 192,264.30 × 80,661.15
  4. Step 4: Simplify right side
    128,186.28x = 15,508,259,541.95
  5. Step 5: Solve for x
    x = 15,508,259,541.95/128,186.28
  6. Step 6: Final answer
    x = 120,982.21

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1.5x scale

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.