Home / 81,222.98-121,836.50-38,518.37

Finding the Fourth Proportional to 81,222.98, 121,836.50 and 38,518.37

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Solution

The fourth proportional to 81,222.98, 121,836.50 and 38,518.37 is: 57,778.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,222.98 : 121,836.50 = 38,518.37 : x
  2. Step 2: Convert to fraction form
    81,222.98/121,836.50 = 38,518.37/x
  3. Step 3: Cross multiply
    81,222.98x = 121,836.50 × 38,518.37
  4. Step 4: Simplify right side
    81,222.98x = 4,692,942,584.73
  5. Step 5: Solve for x
    x = 4,692,942,584.73/81,222.98
  6. Step 6: Final answer
    x = 57,778.51

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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.