Home / 128,484.13-192,725.09-100,427.76

Finding the Fourth Proportional to 128,484.13, 192,725.09 and 100,427.76

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Solution

The fourth proportional to 128,484.13, 192,725.09 and 100,427.76 is: 150,640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,484.13 : 192,725.09 = 100,427.76 : x
  2. Step 2: Convert to fraction form
    128,484.13/192,725.09 = 100,427.76/x
  3. Step 3: Cross multiply
    128,484.13x = 192,725.09 × 100,427.76
  4. Step 4: Simplify right side
    128,484.13x = 19,354,949,084.50
  5. Step 5: Solve for x
    x = 19,354,949,084.50/128,484.13
  6. Step 6: Final answer
    x = 150,640.78

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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.