Home / 128,914.12-177,912.20-71,558.83

Finding the Fourth Proportional to 128,914.12, 177,912.20 and 71,558.83

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Solution

The fourth proportional to 128,914.12, 177,912.20 and 71,558.83 is: 98,757.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.12 : 177,912.20 = 71,558.83 : x
  2. Step 2: Convert to fraction form
    128,914.12/177,912.20 = 71,558.83/x
  3. Step 3: Cross multiply
    128,914.12x = 177,912.20 × 71,558.83
  4. Step 4: Simplify right side
    128,914.12x = 12,731,188,874.73
  5. Step 5: Solve for x
    x = 12,731,188,874.73/128,914.12
  6. Step 6: Final answer
    x = 98,757.13

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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.