Home / 128,428.20-192,642.30-92,998.80

Finding the Fourth Proportional to 128,428.20, 192,642.30 and 92,998.80

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Solution

The fourth proportional to 128,428.20, 192,642.30 and 92,998.80 is: 139,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,428.20 : 192,642.30 = 92,998.80 : x
  2. Step 2: Convert to fraction form
    128,428.20/192,642.30 = 92,998.80/x
  3. Step 3: Cross multiply
    128,428.20x = 192,642.30 × 92,998.80
  4. Step 4: Simplify right side
    128,428.20x = 17,915,502,729.24
  5. Step 5: Solve for x
    x = 17,915,502,729.24/128,428.20
  6. Step 6: Final answer
    x = 139,498.20

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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.