Home / 129,629.76-178,890.49-73,039.92

Finding the Fourth Proportional to 129,629.76, 178,890.49 and 73,039.92

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Solution

The fourth proportional to 129,629.76, 178,890.49 and 73,039.92 is: 100,795.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,629.76 : 178,890.49 = 73,039.92 : x
  2. Step 2: Convert to fraction form
    129,629.76/178,890.49 = 73,039.92/x
  3. Step 3: Cross multiply
    129,629.76x = 178,890.49 × 73,039.92
  4. Step 4: Simplify right side
    129,629.76x = 13,066,146,183.91
  5. Step 5: Solve for x
    x = 13,066,146,183.91/129,629.76
  6. Step 6: Final answer
    x = 100,795.89

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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.