Home / 129,830.79-179,261.39-83,917.61

Finding the Fourth Proportional to 129,830.79, 179,261.39 and 83,917.61

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Solution

The fourth proportional to 129,830.79, 179,261.39 and 83,917.61 is: 115,867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,830.79 : 179,261.39 = 83,917.61 : x
  2. Step 2: Convert to fraction form
    129,830.79/179,261.39 = 83,917.61/x
  3. Step 3: Cross multiply
    129,830.79x = 179,261.39 × 83,917.61
  4. Step 4: Simplify right side
    129,830.79x = 15,043,187,414.08
  5. Step 5: Solve for x
    x = 15,043,187,414.08/129,830.79
  6. Step 6: Final answer
    x = 115,867.64

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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.