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Finding the Fourth Proportional to 81,466.20, 122,110.20 and 28,848.60

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Solution

The fourth proportional to 81,466.20, 122,110.20 and 28,848.60 is: 43,241.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,466.20 : 122,110.20 = 28,848.60 : x
  2. Step 2: Convert to fraction form
    81,466.20/122,110.20 = 28,848.60/x
  3. Step 3: Cross multiply
    81,466.20x = 122,110.20 × 28,848.60
  4. Step 4: Simplify right side
    81,466.20x = 3,522,708,315.72
  5. Step 5: Solve for x
    x = 3,522,708,315.72/81,466.20
  6. Step 6: Final answer
    x = 43,241.35

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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.