Home / 85,785.22-118,425.42-57,121.82

Finding the Fourth Proportional to 85,785.22, 118,425.42 and 57,121.82

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Solution

The fourth proportional to 85,785.22, 118,425.42 and 57,121.82 is: 78,855.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,785.22 : 118,425.42 = 57,121.82 : x
  2. Step 2: Convert to fraction form
    85,785.22/118,425.42 = 57,121.82/x
  3. Step 3: Cross multiply
    85,785.22x = 118,425.42 × 57,121.82
  4. Step 4: Simplify right side
    85,785.22x = 6,764,675,524.66
  5. Step 5: Solve for x
    x = 6,764,675,524.66/85,785.22
  6. Step 6: Final answer
    x = 78,855.96

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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.