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Finding the Fourth Proportional to 66,138.36, 91,169.82 and 40,597.56

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Solution

The fourth proportional to 66,138.36, 91,169.82 and 40,597.56 is: 55,962.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.36 : 91,169.82 = 40,597.56 : x
  2. Step 2: Convert to fraction form
    66,138.36/91,169.82 = 40,597.56/x
  3. Step 3: Cross multiply
    66,138.36x = 91,169.82 × 40,597.56
  4. Step 4: Simplify right side
    66,138.36x = 3,701,272,237.64
  5. Step 5: Solve for x
    x = 3,701,272,237.64/66,138.36
  6. Step 6: Final answer
    x = 55,962.56

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.