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Finding the Fourth Proportional to 128,367.82, 177,087.94 and 83,060.42

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Solution

The fourth proportional to 128,367.82, 177,087.94 and 83,060.42 is: 114,584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,367.82 : 177,087.94 = 83,060.42 : x
  2. Step 2: Convert to fraction form
    128,367.82/177,087.94 = 83,060.42/x
  3. Step 3: Cross multiply
    128,367.82x = 177,087.94 × 83,060.42
  4. Step 4: Simplify right side
    128,367.82x = 14,708,998,576.36
  5. Step 5: Solve for x
    x = 14,708,998,576.36/128,367.82
  6. Step 6: Final answer
    x = 114,584.78

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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.