Home / 87,826.09-121,269.87-81,109.26

Finding the Fourth Proportional to 87,826.09, 121,269.87 and 81,109.26

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Solution

The fourth proportional to 87,826.09, 121,269.87 and 81,109.26 is: 111,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,826.09 : 121,269.87 = 81,109.26 : x
  2. Step 2: Convert to fraction form
    87,826.09/121,269.87 = 81,109.26/x
  3. Step 3: Cross multiply
    87,826.09x = 121,269.87 × 81,109.26
  4. Step 4: Simplify right side
    87,826.09x = 9,836,109,416.00
  5. Step 5: Solve for x
    x = 9,836,109,416.00/87,826.09
  6. Step 6: Final answer
    x = 111,995.30

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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.