Home / 129,183.66-178,288.20-71,828.69

Finding the Fourth Proportional to 129,183.66, 178,288.20 and 71,828.69

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Solution

The fourth proportional to 129,183.66, 178,288.20 and 71,828.69 is: 99,131.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,183.66 : 178,288.20 = 71,828.69 : x
  2. Step 2: Convert to fraction form
    129,183.66/178,288.20 = 71,828.69/x
  3. Step 3: Cross multiply
    129,183.66x = 178,288.20 × 71,828.69
  4. Step 4: Simplify right side
    129,183.66x = 12,806,207,848.46
  5. Step 5: Solve for x
    x = 12,806,207,848.46/129,183.66
  6. Step 6: Final answer
    x = 99,131.79

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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.