Home / 129,418.09-194,128.58-45,178.36

Finding the Fourth Proportional to 129,418.09, 194,128.58 and 45,178.36

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Solution

The fourth proportional to 129,418.09, 194,128.58 and 45,178.36 is: 67,768.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,418.09 : 194,128.58 = 45,178.36 : x
  2. Step 2: Convert to fraction form
    129,418.09/194,128.58 = 45,178.36/x
  3. Step 3: Cross multiply
    129,418.09x = 194,128.58 × 45,178.36
  4. Step 4: Simplify right side
    129,418.09x = 8,770,410,501.15
  5. Step 5: Solve for x
    x = 8,770,410,501.15/129,418.09
  6. Step 6: Final answer
    x = 67,768.04

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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.