Home / 81,635.22-122,480.10-31,716.90

Finding the Fourth Proportional to 81,635.22, 122,480.10 and 31,716.90

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Solution

The fourth proportional to 81,635.22, 122,480.10 and 31,716.90 is: 47,585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,635.22 : 122,480.10 = 31,716.90 : x
  2. Step 2: Convert to fraction form
    81,635.22/122,480.10 = 31,716.90/x
  3. Step 3: Cross multiply
    81,635.22x = 122,480.10 × 31,716.90
  4. Step 4: Simplify right side
    81,635.22x = 3,884,689,083.69
  5. Step 5: Solve for x
    x = 3,884,689,083.69/81,635.22
  6. Step 6: Final answer
    x = 47,585.94

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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.