Home / 87,826.58-121,270.56-81,109.76

Finding the Fourth Proportional to 87,826.58, 121,270.56 and 81,109.76

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Solution

The fourth proportional to 87,826.58, 121,270.56 and 81,109.76 is: 111,996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,826.58 : 121,270.56 = 81,109.76 : x
  2. Step 2: Convert to fraction form
    87,826.58/121,270.56 = 81,109.76/x
  3. Step 3: Cross multiply
    87,826.58x = 121,270.56 × 81,109.76
  4. Step 4: Simplify right side
    87,826.58x = 9,836,226,016.67
  5. Step 5: Solve for x
    x = 9,836,226,016.67/87,826.58
  6. Step 6: Final answer
    x = 111,996.00

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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.