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Finding the Fourth Proportional to 66,379.78, 99,570.48 and 19,633.60

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Solution

The fourth proportional to 66,379.78, 99,570.48 and 19,633.60 is: 29,450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,379.78 : 99,570.48 = 19,633.60 : x
  2. Step 2: Convert to fraction form
    66,379.78/99,570.48 = 19,633.60/x
  3. Step 3: Cross multiply
    66,379.78x = 99,570.48 × 19,633.60
  4. Step 4: Simplify right side
    66,379.78x = 1,954,926,976.13
  5. Step 5: Solve for x
    x = 1,954,926,976.13/66,379.78
  6. Step 6: Final answer
    x = 29,450.64

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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.