Home / 128,200.70-192,301.05-109,173.80

Finding the Fourth Proportional to 128,200.70, 192,301.05 and 109,173.80

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Solution

The fourth proportional to 128,200.70, 192,301.05 and 109,173.80 is: 163,760.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.70 : 192,301.05 = 109,173.80 : x
  2. Step 2: Convert to fraction form
    128,200.70/192,301.05 = 109,173.80/x
  3. Step 3: Cross multiply
    128,200.70x = 192,301.05 × 109,173.80
  4. Step 4: Simplify right side
    128,200.70x = 20,994,236,372.49
  5. Step 5: Solve for x
    x = 20,994,236,372.49/128,200.70
  6. Step 6: Final answer
    x = 163,760.70

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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.