Home / 87,721.75-121,048.66-51,905.49

Finding the Fourth Proportional to 87,721.75, 121,048.66 and 51,905.49

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Solution

The fourth proportional to 87,721.75, 121,048.66 and 51,905.49 is: 71,625.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.75 : 121,048.66 = 51,905.49 : x
  2. Step 2: Convert to fraction form
    87,721.75/121,048.66 = 51,905.49/x
  3. Step 3: Cross multiply
    87,721.75x = 121,048.66 × 51,905.49
  4. Step 4: Simplify right side
    87,721.75x = 6,283,089,276.14
  5. Step 5: Solve for x
    x = 6,283,089,276.14/87,721.75
  6. Step 6: Final answer
    x = 71,625.22

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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.