Home / 87,919.80-121,208.82-55,638.36

Finding the Fourth Proportional to 87,919.80, 121,208.82 and 55,638.36

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Solution

The fourth proportional to 87,919.80, 121,208.82 and 55,638.36 is: 76,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,919.80 : 121,208.82 = 55,638.36 : x
  2. Step 2: Convert to fraction form
    87,919.80/121,208.82 = 55,638.36/x
  3. Step 3: Cross multiply
    87,919.80x = 121,208.82 × 55,638.36
  4. Step 4: Simplify right side
    87,919.80x = 6,743,859,962.34
  5. Step 5: Solve for x
    x = 6,743,859,962.34/87,919.80
  6. Step 6: Final answer
    x = 76,704.68

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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.