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Finding the Fourth Proportional to 66,171.52, 91,325.82 and 40,693.96

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Solution

The fourth proportional to 66,171.52, 91,325.82 and 40,693.96 is: 56,163.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,171.52 : 91,325.82 = 40,693.96 : x
  2. Step 2: Convert to fraction form
    66,171.52/91,325.82 = 40,693.96/x
  3. Step 3: Cross multiply
    66,171.52x = 91,325.82 × 40,693.96
  4. Step 4: Simplify right side
    66,171.52x = 3,716,409,266.05
  5. Step 5: Solve for x
    x = 3,716,409,266.05/66,171.52
  6. Step 6: Final answer
    x = 56,163.27

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Why These Related Problems?

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