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Finding the Fourth Proportional to 66,039.56, 99,057.56 and 18,657.91

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Solution

The fourth proportional to 66,039.56, 99,057.56 and 18,657.91 is: 27,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,039.56 : 99,057.56 = 18,657.91 : x
  2. Step 2: Convert to fraction form
    66,039.56/99,057.56 = 18,657.91/x
  3. Step 3: Cross multiply
    66,039.56x = 99,057.56 × 18,657.91
  4. Step 4: Simplify right side
    66,039.56x = 1,848,206,698.37
  5. Step 5: Solve for x
    x = 1,848,206,698.37/66,039.56
  6. Step 6: Final answer
    x = 27,986.36

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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.