Home / 128,917.85-177,903.87-71,553.82

Finding the Fourth Proportional to 128,917.85, 177,903.87 and 71,553.82

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Solution

The fourth proportional to 128,917.85, 177,903.87 and 71,553.82 is: 98,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,917.85 : 177,903.87 = 71,553.82 : x
  2. Step 2: Convert to fraction form
    128,917.85/177,903.87 = 71,553.82/x
  3. Step 3: Cross multiply
    128,917.85x = 177,903.87 × 71,553.82
  4. Step 4: Simplify right side
    128,917.85x = 12,729,701,491.28
  5. Step 5: Solve for x
    x = 12,729,701,491.28/128,917.85
  6. Step 6: Final answer
    x = 98,742.74

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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.