Home / 81,149.03-121,723.54-53,245.64

Finding the Fourth Proportional to 81,149.03, 121,723.54 and 53,245.64

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Solution

The fourth proportional to 81,149.03, 121,723.54 and 53,245.64 is: 79,868.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.03 : 121,723.54 = 53,245.64 : x
  2. Step 2: Convert to fraction form
    81,149.03/121,723.54 = 53,245.64/x
  3. Step 3: Cross multiply
    81,149.03x = 121,723.54 × 53,245.64
  4. Step 4: Simplify right side
    81,149.03x = 6,481,247,790.37
  5. Step 5: Solve for x
    x = 6,481,247,790.37/81,149.03
  6. Step 6: Final answer
    x = 79,868.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.