Home / 128,278.44-177,087.35-80,558.10

Finding the Fourth Proportional to 128,278.44, 177,087.35 and 80,558.10

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Solution

The fourth proportional to 128,278.44, 177,087.35 and 80,558.10 is: 111,209.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.44 : 177,087.35 = 80,558.10 : x
  2. Step 2: Convert to fraction form
    128,278.44/177,087.35 = 80,558.10/x
  3. Step 3: Cross multiply
    128,278.44x = 177,087.35 × 80,558.10
  4. Step 4: Simplify right side
    128,278.44x = 14,265,820,651.43
  5. Step 5: Solve for x
    x = 14,265,820,651.43/128,278.44
  6. Step 6: Final answer
    x = 111,209.81

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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.