Home / 81,455.03-122,144.21-31,558.49

Finding the Fourth Proportional to 81,455.03, 122,144.21 and 31,558.49

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Solution

The fourth proportional to 81,455.03, 122,144.21 and 31,558.49 is: 47,322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.03 : 122,144.21 = 31,558.49 : x
  2. Step 2: Convert to fraction form
    81,455.03/122,144.21 = 31,558.49/x
  3. Step 3: Cross multiply
    81,455.03x = 122,144.21 × 31,558.49
  4. Step 4: Simplify right side
    81,455.03x = 3,854,686,672.05
  5. Step 5: Solve for x
    x = 3,854,686,672.05/81,455.03
  6. Step 6: Final answer
    x = 47,322.88

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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.