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Finding the Fourth Proportional to 129,879.20, 194,964.60 and 100,427.60

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Solution

The fourth proportional to 129,879.20, 194,964.60 and 100,427.60 is: 150,754.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,879.20 : 194,964.60 = 100,427.60 : x
  2. Step 2: Convert to fraction form
    129,879.20/194,964.60 = 100,427.60/x
  3. Step 3: Cross multiply
    129,879.20x = 194,964.60 × 100,427.60
  4. Step 4: Simplify right side
    129,879.20x = 19,579,826,862.96
  5. Step 5: Solve for x
    x = 19,579,826,862.96/129,879.20
  6. Step 6: Final answer
    x = 150,754.14

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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.