Home / 81,651.56-122,485.05-31,735.49

Finding the Fourth Proportional to 81,651.56, 122,485.05 and 31,735.49

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Solution

The fourth proportional to 81,651.56, 122,485.05 and 31,735.49 is: 47,606.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,651.56 : 122,485.05 = 31,735.49 : x
  2. Step 2: Convert to fraction form
    81,651.56/122,485.05 = 31,735.49/x
  3. Step 3: Cross multiply
    81,651.56x = 122,485.05 × 31,735.49
  4. Step 4: Simplify right side
    81,651.56x = 3,887,122,467.00
  5. Step 5: Solve for x
    x = 3,887,122,467.00/81,651.56
  6. Step 6: Final answer
    x = 47,606.23

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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.