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Finding the Fourth Proportional to 81,774.90, 122,990.40 and 73,245.60

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Solution

The fourth proportional to 81,774.90, 122,990.40 and 73,245.60 is: 110,162.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,774.90 : 122,990.40 = 73,245.60 : x
  2. Step 2: Convert to fraction form
    81,774.90/122,990.40 = 73,245.60/x
  3. Step 3: Cross multiply
    81,774.90x = 122,990.40 × 73,245.60
  4. Step 4: Simplify right side
    81,774.90x = 9,008,505,642.24
  5. Step 5: Solve for x
    x = 9,008,505,642.24/81,774.90
  6. Step 6: Final answer
    x = 110,162.23

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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.