Home / 128,136.70-192,205.05-83,899.90

Finding the Fourth Proportional to 128,136.70, 192,205.05 and 83,899.90

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Solution

The fourth proportional to 128,136.70, 192,205.05 and 83,899.90 is: 125,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.70 : 192,205.05 = 83,899.90 : x
  2. Step 2: Convert to fraction form
    128,136.70/192,205.05 = 83,899.90/x
  3. Step 3: Cross multiply
    128,136.70x = 192,205.05 × 83,899.90
  4. Step 4: Simplify right side
    128,136.70x = 16,125,984,474.50
  5. Step 5: Solve for x
    x = 16,125,984,474.50/128,136.70
  6. Step 6: Final answer
    x = 125,849.85

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Double scale
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Similar ratio
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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.