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Finding the Fourth Proportional to 66,489.40, 99,650.94 and 33,218.79

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Solution

The fourth proportional to 66,489.40, 99,650.94 and 33,218.79 is: 49,786.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.40 : 99,650.94 = 33,218.79 : x
  2. Step 2: Convert to fraction form
    66,489.40/99,650.94 = 33,218.79/x
  3. Step 3: Cross multiply
    66,489.40x = 99,650.94 × 33,218.79
  4. Step 4: Simplify right side
    66,489.40x = 3,310,283,649.16
  5. Step 5: Solve for x
    x = 3,310,283,649.16/66,489.40
  6. Step 6: Final answer
    x = 49,786.64

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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.