Home / 81,791.28-122,686.74-25,635.68

Finding the Fourth Proportional to 81,791.28, 122,686.74 and 25,635.68

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Solution

The fourth proportional to 81,791.28, 122,686.74 and 25,635.68 is: 38,453.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,791.28 : 122,686.74 = 25,635.68 : x
  2. Step 2: Convert to fraction form
    81,791.28/122,686.74 = 25,635.68/x
  3. Step 3: Cross multiply
    81,791.28x = 122,686.74 × 25,635.68
  4. Step 4: Simplify right side
    81,791.28x = 3,145,157,393.45
  5. Step 5: Solve for x
    x = 3,145,157,393.45/81,791.28
  6. Step 6: Final answer
    x = 38,453.46

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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.