Home / 129,121.26-178,208.52-107,576.88

Finding the Fourth Proportional to 129,121.26, 178,208.52 and 107,576.88

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Solution

The fourth proportional to 129,121.26, 178,208.52 and 107,576.88 is: 148,473.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,121.26 : 178,208.52 = 107,576.88 : x
  2. Step 2: Convert to fraction form
    129,121.26/178,208.52 = 107,576.88/x
  3. Step 3: Cross multiply
    129,121.26x = 178,208.52 × 107,576.88
  4. Step 4: Simplify right side
    129,121.26x = 19,171,116,571.02
  5. Step 5: Solve for x
    x = 19,171,116,571.02/129,121.26
  6. Step 6: Final answer
    x = 148,473.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.