Home / 81,391.21-122,092.67-28,082.41

Finding the Fourth Proportional to 81,391.21, 122,092.67 and 28,082.41

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Solution

The fourth proportional to 81,391.21, 122,092.67 and 28,082.41 is: 42,125.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.21 : 122,092.67 = 28,082.41 : x
  2. Step 2: Convert to fraction form
    81,391.21/122,092.67 = 28,082.41/x
  3. Step 3: Cross multiply
    81,391.21x = 122,092.67 × 28,082.41
  4. Step 4: Simplify right side
    81,391.21x = 3,428,656,416.93
  5. Step 5: Solve for x
    x = 3,428,656,416.93/81,391.21
  6. Step 6: Final answer
    x = 42,125.64

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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.