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Finding the Fourth Proportional to 66,481.20, 99,770.40 and 44,287.20

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Solution

The fourth proportional to 66,481.20, 99,770.40 and 44,287.20 is: 66,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.20 : 99,770.40 = 44,287.20 : x
  2. Step 2: Convert to fraction form
    66,481.20/99,770.40 = 44,287.20/x
  3. Step 3: Cross multiply
    66,481.20x = 99,770.40 × 44,287.20
  4. Step 4: Simplify right side
    66,481.20x = 4,418,551,658.88
  5. Step 5: Solve for x
    x = 4,418,551,658.88/66,481.20
  6. Step 6: Final answer
    x = 66,463.18

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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.