Home / 129,709.53-178,999.15-73,120.91

Finding the Fourth Proportional to 129,709.53, 178,999.15 and 73,120.91

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Solution

The fourth proportional to 129,709.53, 178,999.15 and 73,120.91 is: 100,906.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,709.53 : 178,999.15 = 73,120.91 : x
  2. Step 2: Convert to fraction form
    129,709.53/178,999.15 = 73,120.91/x
  3. Step 3: Cross multiply
    129,709.53x = 178,999.15 × 73,120.91
  4. Step 4: Simplify right side
    129,709.53x = 13,088,579,659.43
  5. Step 5: Solve for x
    x = 13,088,579,659.43/129,709.53
  6. Step 6: Final answer
    x = 100,906.85

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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.