Home / 129,917.92-179,220.56-78,917.04

Finding the Fourth Proportional to 129,917.92, 179,220.56 and 78,917.04

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Solution

The fourth proportional to 129,917.92, 179,220.56 and 78,917.04 is: 108,865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,917.92 : 179,220.56 = 78,917.04 : x
  2. Step 2: Convert to fraction form
    129,917.92/179,220.56 = 78,917.04/x
  3. Step 3: Cross multiply
    129,917.92x = 179,220.56 × 78,917.04
  4. Step 4: Simplify right side
    129,917.92x = 14,143,556,102.34
  5. Step 5: Solve for x
    x = 14,143,556,102.34/129,917.92
  6. Step 6: Final answer
    x = 108,865.32

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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.