Home / 128,936.27-177,932.34-71,576.43

Finding the Fourth Proportional to 128,936.27, 177,932.34 and 71,576.43

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Solution

The fourth proportional to 128,936.27, 177,932.34 and 71,576.43 is: 98,775.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,936.27 : 177,932.34 = 71,576.43 : x
  2. Step 2: Convert to fraction form
    128,936.27/177,932.34 = 71,576.43/x
  3. Step 3: Cross multiply
    128,936.27x = 177,932.34 × 71,576.43
  4. Step 4: Simplify right side
    128,936.27x = 12,735,761,678.75
  5. Step 5: Solve for x
    x = 12,735,761,678.75/128,936.27
  6. Step 6: Final answer
    x = 98,775.64

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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.