Home / 129,939.06-179,285.49-76,221.30

Finding the Fourth Proportional to 129,939.06, 179,285.49 and 76,221.30

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Solution

The fourth proportional to 129,939.06, 179,285.49 and 76,221.30 is: 105,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,939.06 : 179,285.49 = 76,221.30 : x
  2. Step 2: Convert to fraction form
    129,939.06/179,285.49 = 76,221.30/x
  3. Step 3: Cross multiply
    129,939.06x = 179,285.49 × 76,221.30
  4. Step 4: Simplify right side
    129,939.06x = 13,665,373,118.94
  5. Step 5: Solve for x
    x = 13,665,373,118.94/129,939.06
  6. Step 6: Final answer
    x = 105,167.55

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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.