Home / 128,136.20-192,204.30-83,899.40

Finding the Fourth Proportional to 128,136.20, 192,204.30 and 83,899.40

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Solution

The fourth proportional to 128,136.20, 192,204.30 and 83,899.40 is: 125,849.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.20 : 192,204.30 = 83,899.40 : x
  2. Step 2: Convert to fraction form
    128,136.20/192,204.30 = 83,899.40/x
  3. Step 3: Cross multiply
    128,136.20x = 192,204.30 × 83,899.40
  4. Step 4: Simplify right side
    128,136.20x = 16,125,825,447.42
  5. Step 5: Solve for x
    x = 16,125,825,447.42/128,136.20
  6. Step 6: Final answer
    x = 125,849.10

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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.