Home / 129,183.74-178,279.50-71,828.91

Finding the Fourth Proportional to 129,183.74, 178,279.50 and 71,828.91

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Solution

The fourth proportional to 129,183.74, 178,279.50 and 71,828.91 is: 99,127.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,183.74 : 178,279.50 = 71,828.91 : x
  2. Step 2: Convert to fraction form
    129,183.74/178,279.50 = 71,828.91/x
  3. Step 3: Cross multiply
    129,183.74x = 178,279.50 × 71,828.91
  4. Step 4: Simplify right side
    129,183.74x = 12,805,622,025.67
  5. Step 5: Solve for x
    x = 12,805,622,025.67/129,183.74
  6. Step 6: Final answer
    x = 99,127.19

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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.