Home / 81,442.50-122,133.72-28,120.86

Finding the Fourth Proportional to 81,442.50, 122,133.72 and 28,120.86

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Solution

The fourth proportional to 81,442.50, 122,133.72 and 28,120.86 is: 42,170.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,442.50 : 122,133.72 = 28,120.86 : x
  2. Step 2: Convert to fraction form
    81,442.50/122,133.72 = 28,120.86/x
  3. Step 3: Cross multiply
    81,442.50x = 122,133.72 × 28,120.86
  4. Step 4: Simplify right side
    81,442.50x = 3,434,505,241.40
  5. Step 5: Solve for x
    x = 3,434,505,241.40/81,442.50
  6. Step 6: Final answer
    x = 42,170.92

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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.