Home / 87,989.24-121,380.60-55,669.64

Finding the Fourth Proportional to 87,989.24, 121,380.60 and 55,669.64

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Solution

The fourth proportional to 87,989.24, 121,380.60 and 55,669.64 is: 76,795.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.24 : 121,380.60 = 55,669.64 : x
  2. Step 2: Convert to fraction form
    87,989.24/121,380.60 = 55,669.64/x
  3. Step 3: Cross multiply
    87,989.24x = 121,380.60 × 55,669.64
  4. Step 4: Simplify right side
    87,989.24x = 6,757,214,304.98
  5. Step 5: Solve for x
    x = 6,757,214,304.98/87,989.24
  6. Step 6: Final answer
    x = 76,795.92

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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.