Home / 128,436.20-192,395.10-89,037.80

Finding the Fourth Proportional to 128,436.20, 192,395.10 and 89,037.80

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Solution

The fourth proportional to 128,436.20, 192,395.10 and 89,037.80 is: 133,377.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436.20 : 192,395.10 = 89,037.80 : x
  2. Step 2: Convert to fraction form
    128,436.20/192,395.10 = 89,037.80/x
  3. Step 3: Cross multiply
    128,436.20x = 192,395.10 × 89,037.80
  4. Step 4: Simplify right side
    128,436.20x = 17,130,436,434.78
  5. Step 5: Solve for x
    x = 17,130,436,434.78/128,436.20
  6. Step 6: Final answer
    x = 133,377.01

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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.