Home / 87,910.92-121,386.60-81,193.86

Finding the Fourth Proportional to 87,910.92, 121,386.60 and 81,193.86

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Solution

The fourth proportional to 87,910.92, 121,386.60 and 81,193.86 is: 112,111.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,910.92 : 121,386.60 = 81,193.86 : x
  2. Step 2: Convert to fraction form
    87,910.92/121,386.60 = 81,193.86/x
  3. Step 3: Cross multiply
    87,910.92x = 121,386.60 × 81,193.86
  4. Step 4: Simplify right side
    87,910.92x = 9,855,846,606.28
  5. Step 5: Solve for x
    x = 9,855,846,606.28/87,910.92
  6. Step 6: Final answer
    x = 112,111.74

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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.