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Finding the Fourth Proportional to 66,067.69, 99,129.30 and 41,128.60

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Solution

The fourth proportional to 66,067.69, 99,129.30 and 41,128.60 is: 61,710.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,067.69 : 99,129.30 = 41,128.60 : x
  2. Step 2: Convert to fraction form
    66,067.69/99,129.30 = 41,128.60/x
  3. Step 3: Cross multiply
    66,067.69x = 99,129.30 × 41,128.60
  4. Step 4: Simplify right side
    66,067.69x = 4,077,049,327.98
  5. Step 5: Solve for x
    x = 4,077,049,327.98/66,067.69
  6. Step 6: Final answer
    x = 61,710.18

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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.