Home / 129,094.08-178,120.70-78,105.54

Finding the Fourth Proportional to 129,094.08, 178,120.70 and 78,105.54

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Solution

The fourth proportional to 129,094.08, 178,120.70 and 78,105.54 is: 107,768.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,094.08 : 178,120.70 = 78,105.54 : x
  2. Step 2: Convert to fraction form
    129,094.08/178,120.70 = 78,105.54/x
  3. Step 3: Cross multiply
    129,094.08x = 178,120.70 × 78,105.54
  4. Step 4: Simplify right side
    129,094.08x = 13,912,213,458.68
  5. Step 5: Solve for x
    x = 13,912,213,458.68/129,094.08
  6. Step 6: Final answer
    x = 107,768.02

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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.