Home / 128,375.25-177,144.24-71,005.44

Finding the Fourth Proportional to 128,375.25, 177,144.24 and 71,005.44

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Solution

The fourth proportional to 128,375.25, 177,144.24 and 71,005.44 is: 97,979.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,375.25 : 177,144.24 = 71,005.44 : x
  2. Step 2: Convert to fraction form
    128,375.25/177,144.24 = 71,005.44/x
  3. Step 3: Cross multiply
    128,375.25x = 177,144.24 × 71,005.44
  4. Step 4: Simplify right side
    128,375.25x = 12,578,204,704.67
  5. Step 5: Solve for x
    x = 12,578,204,704.67/128,375.25
  6. Step 6: Final answer
    x = 97,979.98

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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.