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Finding the Fourth Proportional to 66,419.60, 91,656.28 and 36,204.26

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Solution

The fourth proportional to 66,419.60, 91,656.28 and 36,204.26 is: 49,960.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.60 : 91,656.28 = 36,204.26 : x
  2. Step 2: Convert to fraction form
    66,419.60/91,656.28 = 36,204.26/x
  3. Step 3: Cross multiply
    66,419.60x = 91,656.28 × 36,204.26
  4. Step 4: Simplify right side
    66,419.60x = 3,318,347,791.75
  5. Step 5: Solve for x
    x = 3,318,347,791.75/66,419.60
  6. Step 6: Final answer
    x = 49,960.37

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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.