Home / 115,511.57-173,183.37-77,979.00

Finding the Fourth Proportional to 115,511.57, 173,183.37 and 77,979.00

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Solution

The fourth proportional to 115,511.57, 173,183.37 and 77,979.00 is: 116,911.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,511.57 : 173,183.37 = 77,979.00 : x
  2. Step 2: Convert to fraction form
    115,511.57/173,183.37 = 77,979.00/x
  3. Step 3: Cross multiply
    115,511.57x = 173,183.37 × 77,979.00
  4. Step 4: Simplify right side
    115,511.57x = 13,504,666,366.25
  5. Step 5: Solve for x
    x = 13,504,666,366.25/115,511.57
  6. Step 6: Final answer
    x = 116,911.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.