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Finding the Fourth Proportional to 40,999.60, 61,481.40 and 18,805.60

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Solution

The fourth proportional to 40,999.60, 61,481.40 and 18,805.60 is: 28,200.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,999.60 : 61,481.40 = 18,805.60 : x
  2. Step 2: Convert to fraction form
    40,999.60/61,481.40 = 18,805.60/x
  3. Step 3: Cross multiply
    40,999.60x = 61,481.40 × 18,805.60
  4. Step 4: Simplify right side
    40,999.60x = 1,156,194,615.84
  5. Step 5: Solve for x
    x = 1,156,194,615.84/40,999.60
  6. Step 6: Final answer
    x = 28,200.14

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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.