Home / 109,947.20-164,920.80-100,105.70

Finding the Fourth Proportional to 109,947.20, 164,920.80 and 100,105.70

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Solution

The fourth proportional to 109,947.20, 164,920.80 and 100,105.70 is: 150,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,947.20 : 164,920.80 = 100,105.70 : x
  2. Step 2: Convert to fraction form
    109,947.20/164,920.80 = 100,105.70/x
  3. Step 3: Cross multiply
    109,947.20x = 164,920.80 × 100,105.70
  4. Step 4: Simplify right side
    109,947.20x = 16,509,512,128.56
  5. Step 5: Solve for x
    x = 16,509,512,128.56/109,947.20
  6. Step 6: Final answer
    x = 150,158.55

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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.