Home / 81,635.36-122,429.84-31,704.80

Finding the Fourth Proportional to 81,635.36, 122,429.84 and 31,704.80

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Solution

The fourth proportional to 81,635.36, 122,429.84 and 31,704.80 is: 47,548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,635.36 : 122,429.84 = 31,704.80 : x
  2. Step 2: Convert to fraction form
    81,635.36/122,429.84 = 31,704.80/x
  3. Step 3: Cross multiply
    81,635.36x = 122,429.84 × 31,704.80
  4. Step 4: Simplify right side
    81,635.36x = 3,881,612,820.56
  5. Step 5: Solve for x
    x = 3,881,612,820.56/81,635.36
  6. Step 6: Final answer
    x = 47,548.18

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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.