Home / 81,467.55-122,171.36-28,145.86

Finding the Fourth Proportional to 81,467.55, 122,171.36 and 28,145.86

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Solution

The fourth proportional to 81,467.55, 122,171.36 and 28,145.86 is: 42,208.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,467.55 : 122,171.36 = 28,145.86 : x
  2. Step 2: Convert to fraction form
    81,467.55/122,171.36 = 28,145.86/x
  3. Step 3: Cross multiply
    81,467.55x = 122,171.36 × 28,145.86
  4. Step 4: Simplify right side
    81,467.55x = 3,438,617,548.41
  5. Step 5: Solve for x
    x = 3,438,617,548.41/81,467.55
  6. Step 6: Final answer
    x = 42,208.43

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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.