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Finding the Fourth Proportional to 66,309.44, 99,414.48 and 40,007.96

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Solution

The fourth proportional to 66,309.44, 99,414.48 and 40,007.96 is: 59,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,309.44 : 99,414.48 = 40,007.96 : x
  2. Step 2: Convert to fraction form
    66,309.44/99,414.48 = 40,007.96/x
  3. Step 3: Cross multiply
    66,309.44x = 99,414.48 × 40,007.96
  4. Step 4: Simplify right side
    66,309.44x = 3,977,370,539.26
  5. Step 5: Solve for x
    x = 3,977,370,539.26/66,309.44
  6. Step 6: Final answer
    x = 59,981.97

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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.