Home / 137,939.88-190,379.22-128,935

Finding the Fourth Proportional to 137,939.88, 190,379.22 and 128,935

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Solution

The fourth proportional to 137,939.88, 190,379.22 and 128,935 is: 177,951.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,939.88 : 190,379.22 = 128,935 : x
  2. Step 2: Convert to fraction form
    137,939.88/190,379.22 = 128,935/x
  3. Step 3: Cross multiply
    137,939.88x = 190,379.22 × 128,935
  4. Step 4: Simplify right side
    137,939.88x = 24,546,544,730.70
  5. Step 5: Solve for x
    x = 24,546,544,730.70/137,939.88
  6. Step 6: Final answer
    x = 177,951.04

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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.