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Finding the Fourth Proportional to 66,561.36, 99,815.16 and 33,268.56

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Solution

The fourth proportional to 66,561.36, 99,815.16 and 33,268.56 is: 49,889.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561.36 : 99,815.16 = 33,268.56 : x
  2. Step 2: Convert to fraction form
    66,561.36/99,815.16 = 33,268.56/x
  3. Step 3: Cross multiply
    66,561.36x = 99,815.16 × 33,268.56
  4. Step 4: Simplify right side
    66,561.36x = 3,320,706,639.37
  5. Step 5: Solve for x
    x = 3,320,706,639.37/66,561.36
  6. Step 6: Final answer
    x = 49,889.40

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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.