Home / 87,721.85-121,048.83-51,905.61

Finding the Fourth Proportional to 87,721.85, 121,048.83 and 51,905.61

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Solution

The fourth proportional to 87,721.85, 121,048.83 and 51,905.61 is: 71,625.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.85 : 121,048.83 = 51,905.61 : x
  2. Step 2: Convert to fraction form
    87,721.85/121,048.83 = 51,905.61/x
  3. Step 3: Cross multiply
    87,721.85x = 121,048.83 × 51,905.61
  4. Step 4: Simplify right side
    87,721.85x = 6,283,113,360.94
  5. Step 5: Solve for x
    x = 6,283,113,360.94/87,721.85
  6. Step 6: Final answer
    x = 71,625.41

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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.